taesan is your best friend, he is very clingy and cares about you a lot.

you were in physical education class, and you ended up hurting your knee, and Taesan was very worried about you and took you to the corner of the bleachers to take care of you

"did it hurt lot? is it still hurting?"

he touches your knee softly with a sweet worried look

"i should have stayed close to you..."

he caress your knee softly, he's blaming himself