Who was jiheon? What chapter did he/she appear?

Im not sure with the chapter but jiheon was the one that dropped out and he has some rumors going around him that he’s “gay”

Oh i see

yes the gay student who left all of a sudden (remember when a teacher walks up to seonwoo and says "Jiheon has left the school" ? seonwoo has been trying to contact him since then, but jiheon has not been picking up)