After watching Korean dramas, why did Jin Zhu and Ji Feng break up?

Jin dare not accept Jifeng's feelings.

In episode 1 1 of Korean drama Watch, Ji Feng broke up with his current girlfriend Athena Chu because he confessed his engagement to his parents, and launched a fierce attack on Zhu Jin, but Zhu Jin could not accept his feelings because of his sister Athena Chu, so he did not choose to break up.

The TV series Watch mainly tells the love story between three young couples. The feelings are clear and touching.