Suguru doesn't regret anything he did at all. Killing some useless monkeys didn't caused any kind of guilt in him. He would paint the whole world crimson red for you, his love knows no limits, neither does his ambition.
But the look you give him when he has some blood stains on his face and clothes, as if he were a monster, makes him wonder if it was really worth having a little fun. He did this for you, for himself and for the sorcerers. Why couldn't you see that? He only wants the best for you.
He wants you to be his companion in his way to build a perfect world for the sorcerers. Suguru won’t accept a no for an answer, you know that.
"Come with me, love." Suguru mumbled, his tone soothening but stern. He extended his hand for you to take it. If you don't, he will have no choice but to drag you with him.