Kawaikereba Hentai demo Suki ni Natte Kuremasu ka?

After cleaning the calligraphy clubroom, Keiki Kiryuu finds a love letter addressed to him and briefly celebrates the possibility of finally having a girlfriend. Then he discovers that the anonymous sender also left a pair of panties inside the envelope. His suspects are limited to the girls who were in the room that day, so Keiki begins investigating which one secretly confessed to him. He expects to uncover an ordinary crush, but every attempt to get closer reveals increasingly unusual desires behind the girls' polite appearances. The question soon changes from "Who loves me?" to something far more dangerous: exactly what kind of relationship does the sender want?