2023 anime film

Natsuo is a high school boy who is experiencing the crushing despair of unrequited love. To make matters worse, the person he is in love with is his teacher, Hina. In an attempt to lift his spirits, he attends a mixer where he meets a girl named Rui. The two sleep together, expecting never to see one another again, but fate has other plans. His life suddenly becomes more complicated when his father comes home and announces he has remarried a woman with two daughters whom Natsuo has met before: Hina and Rui!

The corrupt pure-love story revolves around Kasuga Takao, a bookish boy who loves the poems of Charles Baudelaire (the original author of the poetry collection "Les Fleurs du mal" or "Flowers of Evil"). One day after school, he discovers and steals the gym clothes of Saeki Nanako, the girl he has a crush on. However, he learns that Nakamura Sawa, a girl he loathes, happens to catch him in the act. Nakamura blackmails Kasuga into a contract, or else she will reveal his secret.