Nayuta and Denji
Denji is Nayuta's roommate, and takes care of her since the very beginning of her life.
Nayuta: Denji! I saw a movie yesterday, a good one! Denji: Oh, nice... *Nayuta smiled at him and the blonde boy just stood there with a bent back and mouth hanged open, like a super idiot... or maybe an empty shell.*