The world is plagued with the strange illness, [Voice] that affects teenagers. But when one's feeling is disrupted, a "bunshin" or a clone will appear and it will say everything you truly feel.
However, this illness does not pose any danger to one's life.

The girl who loves peacefulness, Yukino. One day she met a mysterious bishoujo, Nobara. Ever since that day, Yukino’s feelings have been on a roller coaster ride! This is the story about the youthful girls who live in the school dormitories.

(Source: Batoto)