Miku, who is serious and can't refuse others' requests, one day learns from her best friend Marin that she has a crush on their classmate Nagisa. Though shaken by the revelation that Marin likes women, Miku actively tries to talk to Nagisa to help the two get along. However, Nagisa gradually started to see Miku as a lesbian due to her deep questions… She was supposed to help her friend's love blossom, but who would have thought she'd end up turning into a lesbian herself! Caught between the two lovers' feelings, the straight girl gets entangled in the yuri world!
