My brother's best friend

Haidyn and Gerald Bond are a sister and brother who are only a year apart, Gerald being the oldest. They have been on their own since they were 14 and 15 years old, when their mother abandoned them, their dad left when Haidyn was 4. Gerald is very over protective of a now 20 soon to be 21 year old Haidyn. Kylan is Gerald's 22 year old, best friend, "business" partner and also the siblings roommate. He has had it just as hard as them, his mother was on crack when she was pregnant with him leaving him with an abusive father who was killed when Kylan was only 14. Kylan was on his own ever since then. What happens when Gerald's baby sister starts to fall for his playa-made best friend. Will this be a match made in heaven or a catastrophe?