Hadakeru Kaibutsu

Yumi's abusive ex, Hayashida Kannosuke, becomes intimate with a co-worker named Shuuna Ayuma. With a new relationship before him, Kannosuke is plagued by memories of his past mistakes and brutal treatment of Yumi, and acts cautiously with Ayuma, who is under the impression that this is Kannosuke's first time in a gay relationship...