Takushi Hatsujou had played with a twin brother and sister when they were all kids, and he fell in love with the sister, culminating in... more>> his asking for her hand in marriage when they grew up, to which she agreed. However, they were torn apart for 10 years until Takushi is finally able to get his grandfather's permission to marry her. When they finally reunite, he is surprised to find they both look like girls. Although he knows one of them is cross-dressing, he can't tell which is a guy and which is a girl. <<less

An 18 year old guy comes to live with his aunt and twin cousins while he tries looking for work. Although he remembers that they... more>> were twin brother and sister, he is surprised too find that they both appear to be girls when he meets them again after several years, so now he can't tell which is a guy and which is a girl. <<less