Tachibana Sumio (Uke)
A Sub who wants to be spoiled. He is Itsumi's partner, and was also his senior back in high school. Currently, he's an outstanding medical intern in plastic surgery.
For the longest time, he thought that his desire as a Sub was to be "completely dominated". However, after meeting Itsumi, he realizes that he just wants to be "a spoiled Sub".
He can have a sharp tongue at times.
Being spoiled by the doting Itsumi, he has slowly come to terms with his true desire to be spoiled.