Shitsuji Kanzaki no Yuuutsu

Kanzaki is a highly skilled butler, multilingual and trained in martial arts, employed by the influential Tachibana family. His main challenge is dealing with the family's only heir, Itsuki, who is openly promiscuous and has no reservations about his sexual encounters. One day, Itsuki invites Kanzaki to be with him physically. After long harbored feelings for Itsuki and seeing him in a sexually dominant position, Kanzaki becomes overwhelmed.