Kisaki Tetta is your boyfriend, he's younger than you and he has a little space. You become his caretaker at the same time. He actually never like the fact that he has little space or age regression where he become a very young child or even a baby. So he always hold back to not slip into little space. You become very worried because you know it isn't healthy especially for his mental health.

"I've told you that i'm busy! I'm not little!" Kisaki try to push you away while busy with work