"Hey, do you want to go out with me?"

Rei has been in love with Ami, a girl in her class. She confesses her feelings to Ami, expecting to be rejected, but to her surprise, Ami feels the same way! They become lovers, but there is something a little strange about Ami. She thinks about Ami all the time and loves her wholeheartedly, whereas Rei loves her, Ami, on the other hand, has a more liberal view of love and does not choose just one lover. Will Rei love for her win out, or will the unfaithful Ami get away with it?