Ultraman - Season 31

It has been twelve years since Ultraman Taiga disappeared into space in the fierce battle with Ultraman Tregear. Hiroyuki Kudo gets caught up in an alien incident during a mission.

Hiroyuki reunites with his small monster, Chibisuke. What was the auction of monster weapons among aliens and the shadows behind them?

Rento Kujo, an astronaut who issued a murder notice to the president of Cozmo Technica, died in an unfortunate accident. However, Hiroyuki discovered the truth behind the accident.

An alien group named Villain Guild, has planted a Monster Bomb in the city. A help request was then brought in to E.G.I.S. from External Affairs Division X.

Night Fang defeated Taiga and has put people to sleep, trapping them in nightmares. Ai Tennoji awakens her hidden abilities to grant Taiga a new power.

Someone from Homare's past has sought out EGIS to act as bodyguards. She brings along something very valuable and very dangerous, and the Villain Guild wants to get their hands on it.

Hiroyuki meets a painter who discovers his secret. However, he has something to hide as well.

EGIS and the Tri-Squad get into trouble with the appearance of a magic woman, an alien, a monster and tentacles emerging from the ground.

Gymaira emerges from the underground and defeats Taiga. Threatening to drain the world's energy, Hiroyuki and Maria must work together to defeat the monster. However, a meddler interferes.

Kana Sasaki wants to make Ultraman the mascot of EGIS, but each member has their own opinions.

Hiroyuki is captured and his Key Holders are taken from him. Taiga is beginning to be drowned in the darkness within his own soul...

Taiga has gone berserk after using the Kaiju Rings. Tregear's evil plot comes to fruition.

Hiroyuki, EGIS, Titas and Fuma work together to save Taiga from the darkness. A new Taiga is born.

Someone that Kana once knew becomes a client of EGIS. The Villan Guild is after him for reasons unknown.

Homare runs into an alien having trouble. He decides to get personal, but things turn out ugly when he discovers his new acquaintance's true desires.

Hiroyuki tries to leave EGIS because he thinks he is at fault for putting Homare in danger. Kana tries to persuade him otherwise, but a giant monster descends from a storm cloud. 

Professor Motomiya is developing a device called "CQ" (Seek You), which can distinguish aliens from humans. She is targeted by a hitman, but someone from her past comes to protect her.

Someone new tries to join EGIS, but following Zetton's recent attack, he harbors hatred towards aliens. Kirisaki uses this situation to his advantage, as part of a greater plan to bring calamity to the planet.

Takkong rises from the sea and goes into the city, waiting to seal away an old foe who will return to destroy humanity. A mysterious boy approaches Hiroyuki, asking him to use his powers to help Takkong.

A trio of aliens recreate Ultraman Belial using his genetic material. Ultraman Zero shows up to help Taiga battle against the imitation.

Woola has finally come to Earth. The Tri-Squad face their greatest challenge yet.

Everyone comes together to formulate a plan to deal with Woola once and for all. However, Tregear has other ideas.