it's his fault for reacting all like that in that first place 10 years ago
It was not his fault ...it was all his mom's fault for pressurizing and a 16yr old boy who have never saw loving family in his whole life how can he know how to make good decisions all his life he grew up for validation then he saw his grandfather choosing an outsider than his own grandson
Everyone's pressuring B.O to get back in form, but no one's even asked once if he's still holding up inside.
This angle is, B.O's been drowning in guilt for nearly 10 years, you know. Tormented, in agony, with mental health symptoms to boot. When he runs into a friend who's still alive, the friend pretends to forget. Are those careless words from his mouth supposed to judge all of his actions? It took 10 years just to come to terms with it and he still couldn't, but now he's supposed to accept the truth overnight? Isn't that too much?
Pio last ep dgaf abt grandfather inviting Jeong Yo to the orchestra also he denied Grandpa's request twice to play with Jeong Yo this means he no longer seek for validation love him for that
I dont think Jeong Yo wants to play with Pi O to destroy his confidence
Well we don't know are they actually talking about Pi O or someone else...well previews can be misdirecting and maybe u are not wrong as well let's see what happen
There were was one hint i noticed that Jeong Ya was pretending....when Pi O & Jeong Yo met at the school Jeong Yo first said Pi O's name in a informal manner then said Kang Pi O Shi
News 
This angle is, B.O's been drowning in guilt for nearly 10 years, you know. Tormented, in agony, with mental health symptoms to boot. When he runs into a friend who's still alive, the friend pretends to forget. Are those careless words from his mouth supposed to judge all of his actions? It took 10 years just to come to terms with it and he still couldn't, but now he's supposed to accept the truth overnight? Isn't that too much?