Senpai Keikan

* Based on a 4-koma manga by Higashiya Meme, serialised in Manga Club and then in Manga Life. Since his androphobe teacher Moriyama Futami prefers not to teach Atsushi how to swim at school, his older sister Atsumi decides to bring him to a public pool, where the smitten Sayo tries to help out. At Take Ani's new job, where he works as a bartender, Atsushi is invited to a…

Miyagawa Atsushi looks like an adult at 180 centimetres tall, but he is actually an elementary school boy. His sister Atsumi looks like a little girl at 137 centimetres tall, but she is actually in high school. This leads to many misunderstandings, much to the dismay of both siblings... Source: ANN