Yoo is the family name of Sana's girlfriend for almost a year. Her name is Yoo Mina, she is the exact opposite of Sana in every way. 

However, Sana had never fallen in love with someone as much as she loves Mina, so she wanted to spend the rest of her life with her, but before she can ask her to do so, Sana needs to get the blessing of Mina's father, Yoo Jeongyeon. 

Will Sana be able to get the approval of Mina's family?

This story is somewhat based on "Why Him" and "Meet the Parents"