My Everyday Harem Vs. The Horny Misfits

Rikito lives alone with his airhead stepsister, Anzu. They attend the same academy where he's pining for Sena Hikawa, but hasn't told her yet. Meanwhile, Anzu's the popular girl at school and can befriend anyone. Then one day, she brings home some new friends to hang out.. (Source: Fakku!)