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.
Did you know this, Senpai?
Wusstest du das schon, Senpai?
¿Sabías esto?
Senpai, sabia disso?