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.
Perhaps the sender was
in a hurry, and dropped them.
Tal vez la que mandó la carta
estaba ocupada y se le cayó.
Talvez a admiradora estivesse
com pressa e deixou cair.