In Kimi to Boku., high school might seem mundane to the students, filled with routine classes and future career concerns. However, for four lifelong friends - the handsome twins Yuuki and Yuuta, the kind-hearted Shun, and the composed Kaname - each day at school becomes a bit brighter in each other's company. Their predictable lives take a turn when Chizuru, a vivacious half-German, half-Japanese transfer student, joins their group. With his lively nature and tales from abroad, Chizuru injects a newfound sense of excitement into their otherwise monotonous routine.