once_0922: hi! NY: Hello, welcome to Bubble! I hope you'll enjoy talking to me for the next month NY: ill start things off, what do you like? once_0922: you. i think you're really cute. -- Inspired by JYPE's Bubble app. All Rights Reserved. ign_ted

Chaeyoung asks for Nayeon's help to win Mina over and offers to help her get with Jeongyeon as a return favour. A story where a series of mixed signals complicates things for four girls.

Twice work together at the Police Force when they suddenly get a new member joining them. A young girl with smarts named Lena, and as the youngest, Twice look out for her. They got assigned a new case, but have the hardest time finding out who is the suspect. What would happen if the suspect actually works with them?

Three different stories lead to different parts, but somehow to each other. Each having 2 older sisters take care of younger. None having anyone else but themselves, until one day all it took was a trip to the park.