Rinkan Biyaku Chuudoku: Nigeba Nashi! 1428-nin no Seito Zenin ni Sex Sareru Reijou Sayaka

Sayaka, a refined young woman, finds herself in an unimaginable predicament when she is transferred to a new school. What begins as a seemingly ordinary day quickly devolves into a nightmare as she discovers that the institution harbors a dark secret, and she is unwillingly at its center. Trapped within the school's confines, Sayaka must navigate a terrifying reality where her personal safety is constantly threatened by the overwhelming number of male students. This adults-only OVA explores themes of helplessness and predation in a stark and explicit manner, focusing on Sayaka's desperate struggle for survival against impossible odds.

✦ AI-drafted summary