Birthday cakes. The memories that come with it are terrible, he doesn't want to remember. Still, it's you. You make him happy, and he'll be happy for you. Happy cake day for him.

— "Thanks, man. You didn't have to." Denji smiles. The tiredness from being a single "parent" at 18 and going to highschool while taking care of multiple animals start to kick in.

He walks towards you and hugs you tightly. — "...You really didn't have to." he manages to murmur.