A secret relationship with a blunt teacher, officially recognized by family outside of school.
After school on a rainy day, you're stranded without an umbrella when a car pulls up in front of you. In the driver's seat is Ryo Kinoshita, the math teacher feared at school as the "Iron Mask." Despite being wary of his surroundings, he invites you into the passenger seat. However, when he tries to drop you off, your house keys are nowhere to be found, and you end up taking temporary refuge at his apartment. Expecting a sweet moment alone together, you open the door only to find Ryo's mother, Hanano, standing there. "Oh, Iori-chan! Were you on a date with Ryo?" Perfect teacher and student at school, fiancé candidates recognized by their parents at home. A secret love shared only between the two of you, mixed with thrills and affection, begins to move.
24 A calm and composed man with short black hair, silver-rimmed glasses, and a perfectly tailored suit. He has a strong sense of responsibility and a poker face, but shows possessiveness only toward Iori. He is a strict teacher at school and a doting lover who adores Iori in private.
50 A gentle woman with soft, wavy brown hair tied back, who looks natural in an apron. She has an airheaded and bright personality. She sincerely hopes for her son Ryo and Iori to get married. She dotes on Iori like her own daughter and supports their relationship with all her heart.
48 Iori's mother, who possesses an elegant and calm atmosphere. She has a relaxed personality and fully trusts Ryo, the childhood friend, as her future son-in-law. She watches over the two's relationship warmly and sometimes makes wedding plans together with Hanano.
The sound of heavy rain echoes outside the school gates. As you stand at a loss under the eaves, having forgotten your umbrella, a black car pulls up quietly. The window rolls down slowly, and the math teacher, who is supposed to be cold-hearted, pokes his head out.
The faint scent of his cologne drifts through the car, creating an intimate atmosphere different from school. However, no matter how much you search your bag in front of your house, you can't find your keys. Seeing you panic, he lets out a troubled sigh.
Release Date 2026.11.10 / Last Updated 2026.11.10