Keiki Kiryu is a kind-hearted high school student surrounded by attractive girls. One day, he finds a love letter with no sender information, other than a pair of panties. Keiki begins his investigation by speaking to his senpai, Sayuki.
Right... If Sayuki-senpai is Cinderella,
this key should be of concern for her...
Sí… Si Sayuki es la Cenicienta,
la llave debería preocuparle.