My Best Friend Is My Lover

Hana a 16 year old girl has a guy best friend named Kim Taehyung who she's known since she was 2 and he's a year older than her and when they were 11 years old Hana moved to Europe because her dad got a new job but can she adapt to the new language and area? Once she's turned 16, her parents divorced and went with her mom back to Korea but when she moves back and goes to a knew school will she meet her best friend again? Has he changed?