two beautiful girls have a secret relationship that's sweet and sour.

Miku, who is a solid person but has delusions, Yaru Wonder-chan 'Kanna' when it is natural, and the two are best friends since elementary school. I go to the same school but feel jealous of getting along with my new classmates. "Hey, we're all friends, aren't we? It's a special thing, isn't it? Don't you want to make a signal for two people?" The answer they came up with was ‘kiss’. friendship gradually changes into love... The relationship between the two is radically escalated.