Yeah, Atatsuki, don't call him by that name. It's rude! Kuran-sama is handsome, well-behaved, and a perfect honor student. Calling him "gang leader" would ruin his image!! At least call him "SUPREME GANG LEADER!!
No one can be a replacement for another person. That is why, farewells are always difficult.
by the time you open your eyes, the world might have already changed.