At Ms. Yanagi"s request, Nasa is assigned to lead a coding class at a high school. The twist: it"s an all‑girls" academy. Amid the boundless energy of teenage girls, he strives to keep his calm, yet deep inside he feels uneasy. A fickle boyfriend, hidden affection for another, and a host of love puzzles that code can"t fix prompt Nasa to wonder if he can solve the formula of romance! As the days unfold, his heart races with lesson and hopes for answers.