"Come on, call her Big Sister."
Pointing at the girl in front of him, Kasumigaoka Hokutsuki called to the group of girls standing behind him.
Watching the crowd of girls gathered behind her little brother, and hearing them all call her Big Sister in unison, Kasumigaoka Utaha clenched her fists.
Yukinoshita Yukino, Shiina Mashiro, Yuigahama Yui... and so many more girls whose names she didn't know. Most importantly, why was her sworn enemy here too?
"I'm not your sister! What's with all these people?!"
Kasumigaoka Utaha was coming apart at the seams. There was no way she could keep this little brother.