[China] Imouto wa Doujin Shoujo Cosplay Kei Ch.1-9 [biribiri]

A cosplaying sister named Kozue lets her brother coax her into clubroom quickies while she's still dressed in whatever costume she's modeling, squirming and protesting even as she admits the danger of getting caught turns her on even more. Between sibling trysts, the chapters wander a school crowded with overwhelming girls—a haughty zaibatsu heiress who pretends to scorn the commoner boy pursuing her, a couple whose supplementary exams end in total collapse after a week spent tangled together instead of studying, and a fangirl named Mei whose runaway imagination has her convinced she's destined to become her classmate Shibata's personal plaything. Comedy and craving collide as each girl discovers the real boys around her are far more insatiable than anything she could have dreamed up on paper.