You can consent to intercourse at the age of 16 in Japan and since he's a 17 year old in Japan it's considered legal.
A 17 year old is not mature enough to consent to that shit, i think we all know how fucked japan is.
I do agree that the author could clearly change the age to 18 but let’s not pretend that you can’t have/ consent to have sex when your 17… I mean it’s at the age where most teen lose their virginity
With other teens who are experimenting yes but not with a fucking grown ass adult, and most teens at that age just experiment most only actually have intercorse after 18, at that age most people were just starting to get into serious relationships at least when i was that age
the seme was a minor T_T