watch/read no.6 it's one of my favs. it's a dystopia type thing so there is violence and there's a few mentions of the underage characters being put into icky situations but it's never in detail and it's handled pretty alright
unfortunately (if you have issues with that) you WILL have to pirate it, cause even at it's peak in like 2011 it was only kinda popular so crunchyroll simply just can't be assed to pay for the rights to host it. But it's only like 11 episodes and the manga is apparently only 30 something chapters so you won't have to deal with pirating website ads for too long
also also if you decide to watch over read i should mention that the anime is pretty true to the manga but the outwardly gay scenes are really toned down when compared to the manga (like in the first episode when the 2 mcs meet in the manga they fall asleep cuddling when in the anime they're just barely holding hands). It's not much of an issue for me but i should probs mention it just in case
This is getting really long but i do also want to mention that before it was even a manga it was a light novel (which from what i heard is even MORE homoerotic) unfortunately i haven't read it yet cause i can not for the life of me find a translated version. but if you can find one i heard it's good
quick edit because i can't believe i forgot to mention it, but PLEASE read misaki kun is unobtainable, it's a silly story about a best friend character in a visual novel trying to help the mc get with one of the love interests, but he's like really cute so the main character is only after him despite the fact that the world they're in won't let him do so. it's so cute and fun i totally suggest you read it (please read it the only post i could find ab it online was a fucking tweet from a femboy of the day account)