Imasugu Oniichan ni Imouto da tte Iitai!

いますぐお兄ちゃんに妹だっていいたい!


The manga revolves Rikuto Mitani after his entrance exams into high school. Rikuto's father just remarried and Rikuto now lives with his "step brother" that appeared to be very feminine and goes to school in a female uniform!