One day, Charlotte Bennett comes to study abroad in Akihito Aoyagi’s class.

All of his classmates are drawn to Charlotte’s elegant behavior and cute appearance, but Akihito feels she lives in a different world and keeps his distance. That changes when he helps Charlotte’s younger sister, Emma, after she gets lost.

He finds out the Bennett sisters live in the apartment next door, and with Emma quickly taking a liking to him, they begin visiting his room almost every day. The three of them play dominoes, eat dinner together, and go out on little outings.

As they spend more time together, Akihito and Charlotte begin to grow closer in their own clumsy way. A sweet and inviting next-door love comedy begins.