Han Joo-wan as Shim Kang-myung Form teacher for Class 2-1, he cares deeply for his students and always believes in them against the advice of the other staff.
Han Joo-wan sebagai Shim Kang-myung Wali kelas dari kelas 2-1, dia sangat memperhatikan murid-muridnya dan selalu percaya pada saran staf lain.