Did we read the same manhwa
Lol
It’s just him being a kid genius experiencing someone better than him for the first time. He kinda fades from the plot for a hot while before coming back in Tatiana’s second school year. Bro apologizes and they end up becoming really good friends with a healthy relationship (even tho earnest still has his little shit moments, so does she). The series just kinda gets better with time + the more Tatiana gets out of her shell and does things outside of school and the piano practice room
I'm just at chap 20 and i don't think I can keep going. Mc is annoying with her overthinking and Ernest is too obsessed it's seriously creepy.