Hazawa Yu and Osaki Mao were high school classmates and became lovers after they became close through art. Yu was captivated by the sight of him engrossed in painting, and believed that this was destined love. However, when they went to university, the two became distant and gradually drifted apart, and before long, they entered the workforce.
(Source: Japanese = natalie.mu || Translation = MyDramaList)
