"Always remember that I love you with all my heart. I love you so much, Zhong Chenle." "I love you too, Huang Renjun. So much"

Huang Renjun went to Korea to pursue his dream as a surgeon eventhough his parents were against it. After spending years studying, he got work at the hospital and unexpectedly met with Zhong Chenle. On their first official date, Chenle answers a call and left him alone. Will it repeated on their next date? What actually happened that make Chenle left in hurry?