Responses
SPOILER
His real name is Yunjae. Yes, same one as the professor. That's the only reason why Hajun got attached to him (the professor) because he only remembered Candy's name as a kid and not how he looked like. After Hajun got into an accident and lost his memories, he saw crying Yunjae and thought he was Candy. That's how they met for the first time.
Also, Professor Yunjae isn't a bad guy at all :) he just doesn't seem to trust Candy being with Hajun.
There’s smth going on with that Yunjae ack. ALSO WE STILL DON’T KNOW CANDY’S REAL NAMEEE!!