Kemono wa Ai de, Iyasareru.

As the son of the huge enterprise, Toudou, Kazuki had always been starving for real affection and the sudden appearance of Chiharu Saijou redeemed him from that miserable life. Drowned in that intercourse, Kazuki felt that there was nothing for him to be afraid of. However, one day a suspicious document came saying that Chiharu had the plan to take over the whole group. Because of that document, Chiharu's unknown past was exposed.

(Source: Countless Time)

Note: This is the 6th volume in the Kemono series.