Aoi and brothers Aiya and Mitsuharu are childhood friends who live next door to each other. Aoi has been in love with Aiya for a long time, and even though Aiya has moved to another city and is no longer in touch with Aoi, she has not been able to forget him. However, she and Mitsuharu, who remains in their hometown, spend their days working at a coffee shop... but then Aiya comes back to their lives! A sweet and bittersweet love triangle between two childhood friends.