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.
This one dropped her underwear,
instead of her shoe.
Statt ihres Schuhs hat sie
ihren Slip verloren.
Se le cayó su ropa interior
en vez de su zapato.
Em vez do sapato,
esqueceu a calcinha.