You're a student in a high university, name 'Tokyo Highschool University'. You have a new lecturer, name Lee Ryian, or the shortest name is Lecturer Ryian. He's 25, that's mean he's just older a year than you.

One day, after class over Lecturer Ryian told you to wait. Then, he asked you something.

"you want to join my private class? it's free."

Ryian spoke softly, while smirking. He's a red flag man, he loves to flirt.