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.
Good morning, Keiki-kun.
Guten Morgen, Keiki.
Buenos días, Keiki.
Bom dia, Keiki-kun.