Jong-hyun falls in love with a Thai woman and must save her when she is in danger.

Jung Geun, who was dating Seon Hye, his first love in high school, separated due to his enlistment in the military and Seon Hye's study abroad. His father suddenly announces remarriage and he has a meeting with his stepmom's family. Isn't his stepmother's daughter Seon-hye?! Jeong-geun and Seon-hye are shocked. However, their past could not prevent their parents from being happy, so their parents eventually remarried, and the two became brothers and sisters and lived in the same house.

A girl from church meets a wanderer who she begins to pity. She wishes to do everything for him and he expresses his anger for through world with her. The man's childhood friend soon discovers his secrets and wishes to steal them.

Campus couple Tae-ho and Eun-seo join the same graudate school to sit in lectures for the most powerful person in Korean journalism, Lee Hee-hyun. On the first day of school, Lee Hee-hyun takes a liking to pretty and smart Eun-seo and uses his authority to try and seduce her, but fails. Hye-jin realizes what the professor is trying to do and spends a night with him, getting herself to the syposium. Eun-seo questions the result and asks Lee Hee-hyun for an explanation. He asks her for physical pleasure and Eun-seo is just confused...

Sejin, a prestigious college student, has a rich and pretty girlfriend, Minhye. Sejin is increasingly irritated with her relationship with Minhye, but she uses a blind date application introduced by her friend Moohyuk. Through the blind date app, she meets a woman who needs to be dispatched. Se-jin, who was neglected and stressed by Seol-hee, accidentally reads her diary while having a meeting with the aim of joking with Seol-hee, and realizes that her first love is herself. Se-jin gets to know Seol-hee's sincerity and Seol-hee gets better. Then one day, while Se-jin confessed her love to Seol-hee and was dating, her girlfriend noticed her relationship with Seol-hee. But, what kind of choice will Sejin make?