Tatara Tani is an average high school first year, both in terms of grades and athleticism. He has two childhood friends that attend his school,... more>> and they're twins! The elder sister Ranko is a flashy gal, while the younger sister Yuriko is a popular idol. They had slowly become distant from Tatara, but even so he always secretly held a crush for Yuriko. One day, Yuriko suddenly asked him out on a date. This date was the beginning of a secret relationship between the twins and him! <<less