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.
is really Sayuki-senpai...
Wenn Sayuki
als Letzte gegangen ist …
de verdad es Sayuki
foram ideia da Sayuki-senpai,