Nanji, Chikai no Kuchizuke wo...

Sixteen-year-old first-year student Rena and eighteen-year-old Kyouta, an upperclassman, are secretly married, though no one at their school knows. Their story follows them as they learn more about each other while trying to keep their marriage hidden from everyone at school. As they navigate their relationship, they face jealousy, love confessions, exams, meddling mothers-in-law, embarrassing situations, noisy neighbors, and teachers.