OniAi Onii-chan Dakedo Ai Sae Areba Kankeinai yo ne! English Subbed

Akiko is thrilled to be reuniting with Akito, the handsome older brother she hasn’t seen in years! In fact, she might be a little too excited. This pint-sized cutie has a big brother complex, and she’s not interested in sharing his attention. Unfortunately for little sister, she and Akito won’t be living alone: three gorgeous girls from the student council will be along for the ride!
(Source: Crunchyroll)