Jihye has not been developed much aside from liking cake.
Let's buy a cake for Jihye who works at night in the hospital
Give her a cake from the Cafe
You now have 1 Mood for Jihye.
Let's buy a cake for Jihye who works at night in the hospital
Give her a cake from the Cafe again
You now have 2 Mood for Jihye.
Repeat giving Jihye cake every night to obtain a total of 5 Mood for her.
Ask her if she has a boyfriend and tell her she's beautiful.
You now have 2 Favorability for Jihye.