---One, two, three.... ACTION!--- Once upon a time, in the world called Earth, lived three bestfriends. Khen, a girl with a lot of optimism, and a very playful one. Zeyah, a girl with lots of memory, and is quite really secretive. Riel, a boy with... lots of wacky doings yet a spoiler box. Everything was fine. Not until an incident happened. Long time short, this and that happened. Like, I don't know, meeting two K-groups with lots of fans! One story, one mystery. You know why? It's the year of 2025/2026 and Korean idols still didn't aged since 2017. «Capture those best memories you have, and live a better life.»