A high school student whose year of not having a girlfriend is his age, Keiki Kiryuu, suddenly received a love letter. He is happy he can finally have a girlfriend, but is also surprised because not only there is no sender name but also includes a white underwear…??? The cute girls who gather around him are all weird and with reasons!? Who is the Cinderella who sent the underwear? The mystery called out mystery, even hentai was called out. A new feeling of love comedy that calls out hentei begins……!!
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.
Keiki's investigation reveals that the senpai he looks up to is a huge pervert, but it doesn't stop him from pushing forward. There are other suspects to interrogate! He approaches his kohai Yuika, a cute and supportive student librarian.
After Sayuki, it's Yuika's turn to reveal her true nature to Keiki. Our hero is now targeted by two girls and still has no idea who Cinderella may be. Between domination and servitude, will he find love?
Keiki continues to receive mixed messages from Mao. Could she be the elusive Cinderella, or is she in love with someone else? Keiki decides that he must confront Mao directly to find out.
Keiki's search for someone who truly loves him, not as the object of a perverted fantasy, hits another dead end. However, another unsigned letter grabs his attention, although this time, it's blackmail.
Keiki works with Koharu to help her win Shoma's heart, but Keiki's attention is diverted by another Cinderella suspect - student council vice-chairperson Ayano Fujimoto. Could she be the one, true, non-perverted secret crush?