“Just because I’m a kid, doesn’t mean I don’t love you!”

Seme loved uke since a kid

Seme fell in love when he was still a kid

Seme

https://myreadingmanga.info/haohao-hao-wakarase-jujutsu-kaisen-dj-eng/

Honorary mention since:
Seme wants to wait to have sex but Uke wants it so bad he doesn’t care about age differencd

Seme as a kid adored uke

Seme loved uke since he was a kid

Seme liked uke since a while back