YUHI
That's why he understands when he watches Sumire looking at Mashima, she wants him. It hurts but at the very least she isn't hiding it. It's a wonder why Mashima hasn't picked up on it.
She ran her fingers through his hair. "Are you upset? About San."
Yuhi grunted. "You know, I'd rather dodge this topic. But, I don't like hiding my emotions from you."
He doesn't want to hide anything from her. Sumire has had far too many bad experiences regarding people keeping things from. When he entered this relationship with her, he promised her that he would be different.
"It upsets me that he got to touch you and no doubt now that he has had you, he will do so again." Yuhi shook his head. "I'm half tempted to beat him up again, but I'm sure Lucifer will do that if he harms you again."
