Beomgyu lives with his Uncles because his parents are business people who are always aboard. He has two little cousins around 5 and 6 years old and when everyone's out a babysitter comes to look after them, but Beomgyu has never met them because he's always out with his friends when the babysitter comes. One day he had to stay home because his friends couldn't hang out, he was sitting on the couch watching TV when the babysitter arrived