Yoo Jeongyeon and Chou Tzuyu are schoolmates at JYP High. They’re going to be in their senior years now after the summer vacation. But they met each other in their junior years when both of them joined the cheering squad of their school.

Jeongyeon is known as a lesbian in the whole campus and her relationship with Mina was the main gossip around. But they already broke up last year because Mina reasoned that she wanted to focus on her studies since they’ll be graduating this coming school year but aside from that, Mina’s main reason is the gossip.

On the other hand, Tzuyu is the campus sweetheart among their batch. But she has distaste with homouals. And she’s not afraid to hide being a homophobic. She doesn’t care if gays, lesbians and biuals hate her. She’s the type of person who is true to herself.

But unfortunately for Tzuyu and Jeongyeon, they have to deal with each other. Jeongyeon’s dad and Tzuyu’s mom is going to get married and they don’t have any choice for it because their respective parents are in love with each other.

Jeongyeon’s mom died from cancer 4 years ago. While Tzuyu’s dad married another woman and divorced her mom.

Jeongyeon has no problem with his dad remarrying. Her only problem is of all people, why Tzuyu’s mom?

Tzuyu couldn’t accept it at first. But when she saw how Jeongyeon’s dad took care of her mom, she went to accept it. But the only thing she couldn’t accept now is the fact that she and Jeongyeon are going to be sisters.

Both of them had had small silly banters or arguments with each other at school; so Jeongyeon thinks, if they are already fighting, what more if they’re already living under the same roof after both of their parents marry?