Bust to Bust: Chotto Kurai Kusatteru no ga Oishiin Desu yo?

The main character of the animated adult film named Igawa Oyashi, returning home after school, decided to visit his classmate Yana-chan. When he came to her, he found himself in the room of a passionate writer in the yaoi genre. Igawa carefully read her works and noticed that she did not quite successfully depict the male genitals. He decided to set an example for her to help her improve her skills.