My Babysitter<3

Liam is just a teenage boy, 15, with 4 bestfriends, 2 younger sisters and very busy parents. His parents are looking for a babysitter because Liam can't look after his sisters.

Alex is just another teenager but she is 16, she is looking for work, she find a babysitting job for a rich family. what will happen when she finds out what family they really are? And when Liam finds out she is his bestfriends girlfriend?