Natsu ga Owaru made: Natsu no Owari The Animation
This is the story of Yui, who agrees to be embraced by a perverted teacher in order to protect her lover Kou's dream. On the day Kou is defeated in a match, Yui is summoned by the perverted teacher to visit his room. It was because of a promise the two of them made. As ○○, pain and pleasure mix together, she eventually transforms into a lustful flesh pot.

Natsu ga Owaru made: Natsu no Owari The Animation
This is the story of Yui, who agrees to be embraced by a perverted teacher in order to protect her lover Kou's dream. Under the relentless pleasure-torture and teasing, Yui becomes addicted to carnal desires and becomes an obedient sow. As the summer gradually comes to an end, what is her final decision...?