Yonomori Kobeni is a whiz at housework, has a curvy figure, and is otherwise a completely ordinary high school student.
On her 16th birthday, she is suddenly greeted by a fiancee, Mitsumine Hakuya (who is nearly invisible), and his little sister Mitsumine Mashiro (who appears to be a little girl). The two move in with her with little warning. Her sister Yonomori Benio is a pervert with a sister complex. Will Kobeni's life be turned upside down or not? ...more