Just Because—It's the last semester of high school, so all Haruto Soma and Mio Natsume need to do is keep on studying and avoid any major drama until getting their diplomas. That plan gets derailed by the sudden transfer and reappearance of their mutual friend Eita Izumi, who moved away four years ago. It’s awkward for them, since they’re not the same as they were back in middle school, and reconnecting means addressing old issues and unresolved feelings.