Yuujin, a leopard werecat, holds a secret relationship with Ei, his friend, lover and servant since childhood. Both are at their limit when talking about their relationship, because Yuujin out of duty with his family doesn't have the freedom to love Ei openly and, Ei out of afraid to be rejected doesn't end their actual relationship and start a new one.
I feel that I like this side-story more than the main one.
Fukigen Kareshi no Nadamekata