Himitsu no Mizuki-sensei

Tenma Akitaka, a junior high student, becomes increasingly curious about Mizuki-sensei, his homeroom teacher. Though she appears unremarkable with her glasses and plain clothing, she frequently visits the old school building in a more cheerful manner. Driven by his curiosity, Tenma begins to investigate her. As he learns more, he discovers aspects of her that are both playful and natural. What he intended as an investigation instead leads him to explore these intriguing facets of her personality. The story follows his attempts to uncover the truth behind Mizuki-sensei while being drawn into her lively and unexpected behavior.