Amaeta Kemono no Shitsukekata

Kazuki works as an intern using a pseudonym at his father's company. He is in a happy relationship with Saijou Chiharu, but feels jealous when she becomes the focus of attention at a mixer event. In response, he decides to stop having sex with her. The story explores how long he can maintain this decision. This is part of a series, specifically the twelfth volume in the Kemono series.