My Stubborn - Season 1

Sorn and Jun work together at the same company but tend to argue and prank each other.  However, their relationship changes when Sorn rescues Jun from a tense situation at a bar.

Sorn offers to train Jun in the ways of intimacy.  Jun agrees not to practice with anyone else until his training is complete. 

Juin drinks heavily at a bar with Piang, confused about Sorn. Franz tries to kiss drunk Juin, but Sorn stops it. Sorn claims exclusivity while teaching Juin. Later, Sorn defines their relationship as purely physical.

Sorn demands exclusivity from Juin but flirts with Penny, confusing Juin. Sorn shows kindness by driving interns but also plays office pranks on Juin, causing trouble with P'June. Champ tells Tai about the pranks.

Sorn apologizes to Juin for the pranking at the meeting and causing him to be scolded by June. But, this time, Juin is not as quick to forgive him. Hia Thai is finally back and Champ is more than happy to see him.

Sorn feels jealous when Jom drives Juin home after Sorn's date with Penny. After ending things with Penny, Sorn promises daily breakfasts with Juin. He's jealous of Jom and Phut's closeness to Juin but becomes more.