Han Xu (L-Mo)

Because of her personality, highschooler Xu Ting is often picked on by her classmates. Until one day, the school’s young, new maintenance worker saves her. His attractive looks and mysterious aura enthrall the bullies. Xu Ting feels indebted, yet in the small forest after school, she accidentally discovers his deepest secret?!

In senior high, Yang Mu Li and Xun An drifted apart because of a misunderstanding. Seven years after graduating, they've both returned to their alma mater as teachers: Yang Mu Li as a two-faced math teacher, and Xun An as a cool and aloof PE teacher. But it seems that Yang Mu Li… doesn't recognize Xun An?!Though many things have remained the same, the people themselves have changed. Can the feelings that once died come back once more? Meanwhile, the secrets they held during that one shared year of high school are slowly revealing themselves…— A webcomic by the author of Love Like Cherry Blossoms!Alt. Official English: Inkr Webcomic

He knows her secret. She knows his secret too. He is the coolest guy in school. She is the curve wrecker of class. They make a deal in exchange to keep each other's secret. They should be strangers after that promise. But he offers to help her confess to her crush at the same time. Is that true? Is he just teasing her? Or...?