Nee Chanto Shiyou Yo!

Synopsis

When Kuuya's parents died, he was adopted by the Hiiragi family. In a house of six older sisters, he was the only man. Eventually, he fell in love with his sister Kaname, but his father noticed him and was worried about what he could become, so he sent Kuuya to his distant relatives. Now Kuuya has decided to go back and visit his sisters, who are more than pleased to have him back, at least, most of them...