The series (also known as Boku Sefu ) is an adult anime based on the manga by Ailail, produced by Bunny Walker . While the specific "Episode 12" mentioned in your query might refer to a specific chapter in the manga or a misinterpreted numbering of the OVA/ONA releases, the core narrative of the series centers on the psychological and sexual awakening of its protagonist, Nanashi. The Foundation of the "Sex-Friend" Relationship
Fans of quiet, introspective romance (e.g., Kimi ni Todoke from a male perspective, Horimiya ’s Miyamura moments, or The Guy She Was Interested in Wasn’t a Guy at All ). Avoid if: You dislike slow pacing, internal monologues, or trope-heavy high school settings. boku ni sexfriend ga dekita riyuu ep12 of 4 verified