EDITED not the beginning (characters)

seokjin is a dietician who works for mrs. jeon. he visits the jeon mansion every morning and leaves in the evening. he started working for her a month ago

seokjin dislikes mrs. jeon's son, jeon jungkook because jungkook told seokjin that he (seokjin) settles for the bare minimum and does not work hard.

jungkook is a branch head of an enterprise. he is known to be rude and cold but everyone knows he has a heart of gold (except seokjin obv). he is marrying his childhood friend in 6 months and that's all you need to know