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.
Hey, Keiki-kun...
Sag mir, Keiki …
-Oye, Keiki.
-¿Sí?
- Ouça, Keiki-kun.
- Oi.