Will contain smut : "Who are you"? She asked with a deep voice.... Oh my god it's a boy. ~~~~~~~~~~~~~~~~~~~ In which y/n discovers the excitement of sneaking around with boys at night.

Your sister has a boyfriend, in fact she has more than one. But tsukishima doesn't deserve that treatment.... And your sister doesn't deserve him. So who does..... you? Do you deserve him? Do you want him? More than her? Interesting...