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.
W-Wait, Sayuki-senpai?!
M-M-M-M-Moment Sayuki?!
¡Espera! ¿Sayuki?
Espera, Sayuki-senpai?