introduction: Kyosokei Tokito thought his high school life would be quiet and predictable. He studies, keeps to himself, and tries to survive school with as little drama as possible. As one of the top students in his class, he already has enough pressure without unnecessary attention. But everything changes the day a new transfer student walks into his classroom. Her name is Soyoki Tokito. She is cheerful, friendly, and quickly becomes popular with everyone around her. And she is also Kyosokei’s mother. Years ago, Soyoki had to give up her chance to finish high school because life took an unexpected turn. Now, with the opportunity to finally experience the youth she missed, she enrolls in the same school as her son. The problem? They must hide their real relationship from everyone. To avoid awkward questions and embarrassing rumors, they pretend to be cousins. However, keeping that secret turns out to be much harder than expected. Soyoki’s warm personality quickly attracts attention from classmates, while Kyosokei constantly worries that a single mistake could expose the truth. Between curious friends, awkward misunderstandings, and chaotic school situations, Kyosokei’s once peaceful life slowly turns into a daily disaster. Behind all the comedy and confusion is a story about family, youth, and the strange experience of sharing the same school life with the person who raised you. Sometimes the biggest challenge in school isn’t exams or popularity. Sometimes it’s making sure nobody finds out that the transfer student sitting behind you… is your mother.