Four undergraduates decided they needed a job for extra income.

A so-called brilliant idea sparked into the tiny brain of Oh Sehun.

"We can be babysitters!" -Sehun

"Baby, you're a genius." -Suho

"Sounds like a good plan to me," -Luhan

"Oh my god, you're so smart!" -Xiumin

Little did they know, the biggest nightmare is coming in their way.