Oscar's manga / #human blood bank(1)

Spoilers I started this when I was younger and dropped it? I think. And now I finished it, and it was a good read. They fight over kind of trivial things imo and also it's kind of weird how some side characters are very gay but also very homophobic. Also 5 years is very sus, like ~20yo side character dating ~15yo?? Someone correct me if I'm wrong about the ages, but I think it's still very sus.