The uke is from a circus and he's advertised as part animal (he's not really part animal). Butler buys him for his master who in the beginning is a little boy. When the butler gives the uke to the little boy, the uke is in a bag. Later the little boys grows up to be a aggressive seme. There's this one scene of the butler holding the uke's arm above his head and the seme entering him. At the very end the butler thinks something around "I wonder what would've happened if I kept you to myself instead of giving you to young master" or something like that.

Wrong section to post, but...

No.99: Ningen Omocha

KanataxYuki will always remain in my heart...
Their love is so profound~!
CrangolaFango

Ah, my bad- sorry, still new to this.
and
Thank you very much ! I was looking for this for a while now.