In order to enter the university of her dreams, high school student Misaki Takahashi is introduced by her brother to be tutored by her good friend Usami Akihiko? He is called Mr. Bunny? On the first day of tutoring, Usami Akihiko, a popular BL novelist, gave Misaki a practical and vivid lesson. Misaki was furious because Akihiko regarded her brother as the protagonist of a forbidden novel and wanted to seek justice for her brother. Even if she insisted on her dignity as a man, she was still defeated by the teacher's superb hand skills. As time went by, Misaki, who was so slow, didn't know that she fell in love with Mr. Bunny while interacting with the teacher, and even began to envy and be jealous of her brother unconsciously. Is she deeply trapped in a one-sided relationship? The delicate balance broke out after her brother brought his girlfriend home and announced his marriage! What kind of future will the two innocent people have? Under the spring breeze and cherry blossoms, a story of love and innocence is unfolding.