Project Sekai: reader insert
the title says it all. WxS = you're Emu's little brother/sister (same age but still younger by a few months) L/n = you're an only child VBS = you're An's big sister/brother N25 = you're an only child (but like an older sister to Mizuki) MMJ = you're Airi's best friend that Airi dragged you to be a part of MMJ slow upd...