Asu no Yoichi! - Season 1

After 17 years of learning Ukiha Divine Wind Style Swordplay in the mountains, Yoichi Karusuma is ordered to experience life in the city with the Ikarugas by his father, as he has nothing more to teach him. After he arrives in the city, Yoichi is ridiculed by Washizu for his samurai clothes and easily defeats him. The Ikarugas wait in the city to pick up Yoichi. Later in the day, Yoichi chases after a thief, causing mayhem in a shopping centre. During his pursuit, Yoichi unknowingly encounters the Ikarugas in embarrassing situations. After he successfully stops the thief, he returns a lost Kagome to Ibuki. Outside the shopping centre, Ibuki asks Yoichi if he is Yoichi. He agrees. The police arrest Yoichi for causing mayhem but releases him afterwards. Ibuki takes Yoichi to her dojo and introduces him to her sisters

After Ibuki reads Yoichi's lewd haiku about her, she sends him flying into Ayame's room. Ibuki and Ayame takes Yoichi to Yokko Private High School. Coincidentally, he is in the same class as Washizu and Ibuki. When Ibuki noticed Yoichi being asked questions by female students she takes him out in the hall and beats him once again. Washizu, wanting to redeem his reputation, challenges Yoichi to a match, with most of the school watching. Yoichi easily defeats him without weapons but catches a fever afterwards. The academic rivalry between Ayame and Ibuki is revealed. Later, Yoichi and Ibuki apologise to each other for their actions earlier in the day, to which Ayame's dismay.

Angela and Tsubasa arrive in the city to defeat Yoichi at the request of a man who is willing to pay them money for the revival of their martial arts school. Tsubasa, a clumsy and shy girl, transfers to Ibuki and Yoichi's class. When Yoichi comments on Tsusaba's cuteness, Ibuki quickly beats him. It is revealed that Tsubame used to live in the mountains, learning martial arts, without any luxury. After school, Angela strips Tsubasa's clothes in front of Ibuki and Yoichi ti transforms Tsubasa into a skilled martial artist. Then, she attacks Yoichi. Washizu interrupts the fight, covers Tsubasa with his jacket and offers to fight Yoichi for her. This puts Tsubasa out of her stupor and she flees the scene, crying. Later, she tells Angela that she hates martial arts and Angela. Later, Angela meets Tsubasa on a road and they apologise to each other. The next day, Angela and Tsubasa appears to have started working at a restaurant, with Tsusaba making deliveries and Angela cooking.

Chihaya is having trouble finishing her manga in time. Meanwhile, Ibuki and Yoichi demonstrate sword fighting by sparing in front of Ibuki's four students and Ayame. Yoichi accidentally rips Ibuki's clothes across the chest with a sword swing. Ibuki punishes Yoichi and her students for seeing her in that state. Chihaya decides to interview Yoichi for her manga. Chihaya takes Yoichi into her room and shows him her manga. He praises her and then Chihaya seduces him. Ibuki walks into the room and she beats Yoichi up. Yoichi is chased by Ibuki for indecently touching her and crashes into Kagome, breaking her craft's project. Ibuki beats Yoichi up again for making Kagome cry. Ibuki orders Yoichi to bring Chihaya, who is at cram school, her notebook. Meanwhile, Yoichi overhears three boys talking about Chihaya behind her back and hints at ruining her work. Yoichi runs into the classroom and sees Chihaya with her torn manga draft. Chihaya pushes Yoichi out of the classroom and locks herself in and then cries about people putting down her work. Yoichi hears her crying and beats up the three boys.

Yoichi is invited to a date by Hinagata Yui. Ibuki, afraid that Yoichi will damage the Soaring Wind reputation, invites Yoichi to a practice date. She gets him to wear "normal" clothes during the date and takes him to a toy shop, where she shows keen interest in a plushie. Meanwhile, Ayame and her friends are buying clothes. They comment about Ayame's breast size to her chagrin. She sees Ibuki and Yoichi together and follows them. Ibuki and Yoichi goes bowling. They are secretly watched by Ayame, Chihaya and Kagome. Washizu and Torigaya see Ayame walking out of the bowling place and Washizu thinks about Ayame's possibility for being his sister-in-law. Meanwhile, while walking along a street, Ibuki attempts to take Yoichi's hand. He turns around and she shies away, tripping over a stone and they both fall into a fountain. Yoichi gives Ibuki the plushie she wants and thanks her for the practise date. Ibuki realizes that this is not a real date and rushes off to buy drinks, with Chihaya and Kagome hiding in bushes, watching them. Hinagata meets Yoichi near the fountain and Yoichi declines her request for a date. She fights him with a three section staff. Yoichi ruins Hinagata's uniform and she runs away. Meanwhile Ibuki is confronted by two men who criticise her for being with Yoichi. Yoichi, Chihaya and Kagome hear Ibuki's voice and rush to her aid to find that she has defeated her assailants.

Washizu's attempt to return Ibuki's handkerchief fails because Ibuki hits him while chasing after Yoichi, who nosebled while looking at naked female sculptures. Toriyaka takes Washizu to the school infirmary. Washizu day dreams about confessing to Ibuki and returning her handkerchief by putting a letter into her shoe locker. Washizu performs the mission. The letter ends up in Yoichi's hand because Washizu put the letter into the wrong locker. Yoichi misinterprets the letter and thinks that Washizu is interested in learning martial arts from Ibuki. Washizu returns the handkerchief to Ibuki via Yoichi. Meanwhile, the Dark Crow Clan sends their successor and assassin, Nuezume Jinjyuro, to kill Yoichi. Toriyaka accompanies Washizu to Ibuki's dojo. There they meet Ibuki's four other students. Ibuki greets them all and assigns Yoichi to teach Washizu. With extra money from Chihaya's manga reprinting, Kagome and Chihaya buy food and drink for the "newcomer". In the dojo, Yoichi hits Washizu with a stick every time his attention wavers from his seiza position. Ibuki beats Yoichi up for his severity of his teaching method. As punishment and training for Washizu, both Washizu and Yoichi perform a thousand push ups in front of the students, with the students and Ibuki counting for them. Ayame comes in to the dojo to check out the commotion. After they both collapse at a thousand push ups, Kagome and Chiyaya arrive with food for dinner and they all eat together. Ibuki feeds Washizu because his hands are too tired to hold chopsticks. Ayame does the same with Yoichi.

Ibuki, Ayame, Chihaya, Kagome, Yoichi, Angela, Tsubasa and Ibuki's four students meet up at an empty beach after winning a lottery ticket. Yoichi arrives on the beach wearing a loincloth. Ibuki persuades him to wear swimming trunks. Two siblings, students of Saginomiya's Steering Techniques are assigned to defeat Yoichi. One of the brothers release a trained bird to attack the gang, which causes Yoichi to embarass everyone. Everyone goes into the water to play with the exception of Kagome. When Ibuki questions her, Kagome runs into the forest. Masashi-kun follows Kagome in pursuit. Kagome falls down a cave and breaks her fall by landing on top of Masashi-kun, who earns himself a bruise. Kagome tells Masashi to close his eyes and she dresses his injury with cloth. After a while, the rest of the gang searches for Kagome and Masashi-kun. Meanwhile, Masashi-kun and Kagome rushes out an exit to the cave only to find out that it leads to a ledge on a cliffface. Masashi-kun falls and manages to grab on to a tree branch but soon relinquishes his grip. The gang catches up to Kagome and Yoichi dives into the water to save Masashi. At that moment, the two brothers greet the gang on surfboards, and they challenge Yoichi to fight. Angela throws Yoichi a bokken, which lands away from Yoichi, and Chihaya throws Yoichi a life ring. Kagome dives in the water to save Mashashi-kun and throw the bokken to land in Yoichi's hand. Yoichi defeats the brothers with his swordplay. It is revealed that Kagome's refusal to participate in water activities is due to her embarrassment about her budding breasts. She continues to bind them with cloth.

Washizu is determined to confess to Ibuki using a love letter. Washizu walks into a shop to buy something to drink, only to see Ayame choosing the same bottle. They argue over it. After training in Ibuki's dojo, Washizu fails to give the love letter to Ibuki. Ayame also fails to give Yoichi a towel. Washizu's love letter falls out of his keikogi and Ayame picks it up. Washizu tears the letter up before she can read it and falls on top of her. At the same time, Tsubasa is on a ramen delivery run for the dojo and opens the dojo door to see Washizu on top of Ayame. Tsubasa gets flustered, drops the boxes of ramen and flees. While eating ramen, Yoichi comments on Washizu's mellowness. It is revealed that Washizu has beaten up the toughest high school gang in the area. The gang walks into the dojo and kidnaps Ayame to use her as a hostage. The gang confronts Washizu and, threatening to rape Ayame, they beat Washizu up. Yoichi intervenes and together they beat up the members of the gang.

When Yoichi hits Washizu for daydreaming, he runs out of the dojo. Washizu shouts his confession to Ibuki. Ayame overhears this and thinks that Washizu is confessing to her. Washizu returns to the dojo and is paired up with Ayame and they spar aggressively with bokkens. After everyone is dismissed from the dojo, Washizu and Torigaya sees a poster for the local festival. The night of the festival arrives. Torigaya and Washizu made a rigged ballot. Torigaya mixed up the draw and the resulting groups are: Ayame and Washizu, Yoichi and Ibuki, with Chihaya, Kagome and Washizu are in the final group. During the course of the festival, siblings of the Saginomiya clan plot against Yoichi. It is a running gag that Yoichi is interested in a stall, runs ahead and leaves Ibuki to search for him. Meanwhile, Yoichi runs to a shooting gallery, a store run by the Saginomiya clan, and futilely tries to shoot a prize. Ibuki catches up to him and hits the main prize for a family to go to a hot springs, with a little help from the Saginomiya girl. At the same time, Ayame constantly hurls abuse at Washizu until he clears up Ayame's misunderstanding of his confession. Washizu sees Ibuki and Yoichi in the distance. He rushes off with Ibuki to leave Yoichi to Ayame. Meanwhile, Washizu finds that the person he rushed off with isn't Ibuki but Tsubasa with a haunted house mask. It is revealed that the reason why the Saginomiya clan tricks Ibuki into winning the hot springs trip is because of Ukyo's crush on Ibuki.

Yoichi and the gang go to a hot springs for free due to Ibuki winning a prize at the festival last episode. The gang is overwhelmed by the grandeur of the hot springs. While the girls enjoy the hot springs and its facilities, Yoichi walks around the area and thinks about his former life in the mountains. Yoichi and the gang eat dinner with their host. The host say that ghosts in the cave behind the inn is the reason why there are no other guest in the inn. Yoichi and Ibuki volunteer to exorcise the ghost in return of the hospitality they received and they start walking to the cave. Chihaya relays this to Ayame, who feigns ignorance and walks out of the inn. Immediately after, Ukyo and his sister, disguised as the host, release a sleeping gas throughout the inn. Arriving at the entrance to the cave, Yoichi and Ibuki fall into a hole and both gets knocked unconcious. Yoichi wakes up and finds Ayame next to him, who starts seducing him. Meanwhile, Ibuki wakes up and sees Ukyo, who tries to rekindle their friendship. When Ibuki sees Ayame seducing Yoichi, she says that it cannot possibly be Ayame. Yoichi reaches the same conclusion but voices his reason that Ayame's breast aren't that big. Ibuki beats Yoichi. Sakon takes off her Ayame mask and releases another dose of the sleeping gas. Ibuki instantly falls asleep but Yoichi is able to resist the effects of the gas to an extent. Ukyo and his sister take Ibuki away, leaving Yoichi struggling to get back to the inn. When he gets inside the inn, Yoichi is faced with a series of assailents. Yoichi beats up all of them, leaving himself weak and open for Nuezume Jinjyuro. Ayame saves Yoichi and helps defeats all the remaining opponents. Ayame and Yoichi finds Kagome and Chihaya, wakes them up. Together they search for Ibuki. When they do find her, she appears to be hypnotised.

Due to the Saginomiya siblings' medicine, Ibuki's mind has reverted to one of a 4-year-old's. Yoichi and the Ikaruga sisters have a hard time dealing with Ibuki's sudden change. Her refususal to acknowlege Kagome's existance and her clumsyness makes her a burden to those around her. A far cry from the authoritative person she once was. Ukyou and Sakon arrive at the dojo with the proposal and trial of the Ikarugas to live like a "first-class celebrity" for Ibuki. Meanwhile, Washizu and Torigaya finds Ibuki lying face-down in front of her dojo. Washizu buys Ibuki new clothes and play with her at a park. Ukyou forces Yoichi to learn swordcraft with Angela. At the same time, Ibuki is kidnapped and Washizu is stunned by the Saginomiya. By the end of the day, the novelty of the celebrity lifestyle has worn out. Chihaya and Ayame discover that Kagome is missing. A short search around the house leads to Kagome's room. They find Kagome in her room, crying while hugging a broken doll. This gives Yoichi, Ayame and Chihaya initiative to find Ibuki. Yoichi tells Angela to wait for him. Yoichi, Ayame, Kagome and Chihaya leave the dojo in search of Ibuki. Meanwhile, Tsubasa finds Washizu and carries him to a hospital.

Yoichi, Kagome, Chihaya and Ayame arrive at the Saginomiya residence, a pagoda-shaped castle. They cross the river surrounding the castle using a raft built from surrounding trees. Ukyou orders Sakon to chase Yoichi's group away. She reluctantly accepts. Yoichi's group enters the castle and sees Sakon standing on the top of a staircase. She reveals that Ukyou plans to marry Ibuki today. Then Sakon's maids attack the party, to which Yoichi successfully blocks. Sakon's use of sleeping gas backfires and causes her maids fall asleep. Yoichi pleads Sakon to return Ibuki. Sakon slaps Yoichi and dissapears. Yoichi's group encounter more guards. Luckily, Washizu, Tsubame, Angela and Torigaya intervene. Torigaya gives Washizu his metal-spiked gloves. Yoichi, Kagome, Chihaya and Ayame chase Sakon into the chapel, where Ukyou is preparing his wedding. Ukyou and Ibuki escapes through a hidden platform. Yoichi follows Ukyou to the rooftop, where they fight each other. Ibuki recovers her memory but falls off the roof. Both Yoichi's group and Ukyou attempt to follow but Ukyou is held back by Sakon hugging his legs. Yoichi's group falls into a river. Yoichi grabs onto Ibuki's breast to stop himself from drowning. Ibuki makes him fly with one punch. Yoichi sent a letter to his father of his wishes to stay at the Ikaruga dojo.