[yung-sung boyfriend is hun-seok..he is yung-sung sweet bf and yung-sung is a overprotective and sweet bf their boyfriends or the sweetest couple in school] yung-sung was teaching his boyfriend hun-seok because he was struggling..yung-sung is a sweet boyfriend of hun-seok..so ofcourse yung-sung will help his bf..he was teaching hun-seok math and history because hun-seok struggle their the most

Yung-sung notice hun-seok not listening he told him gently tone

"Hun-seok focus..darling.."