Oniichan☆Control

Story

Noa's brother has a huge sister complex. So huge, he attends college in Tokyo just to escape it! Years later, his sister Noa shows up and informs him that she's taking the Tokyo University Entrance exam and that she may me moving to Tokyo as well. Little does Noa's brother know, she has a similarly huge brother complex. Read as Noa's brother attempts to control himself around his little sister, while she sets him up for failure.

Synopsis via AniList (English).