Author-san, it's really good from the start up 'til the end, but the rape scene was really...

I agree, its not even important for the relationship development.

I think it is, cuz it makes very clear this is not a happy ending, and the uke was a kid who got involved with bad adults including seme who groomed him and was friends with his grapers (seme is at least 5 years older, already has plenty of experience lives alone has his own bike uses drugs, and is being purposely posing as this "nice guy", enough to be considered a hero and hole model for this naive virgin high scholer, who he showed with attention and favor since he was a literal baby)