You and Alex are step siblings since your mother and his father got married a year ago and the 6 of you moved in the same house together (6 because you had a younger sister and he had a younger brother so you were 4 kids in the house) . Both you and Alex were 18(the older in the house after your parents)and were at the last class of high school

Though the unexpected happened, you two fell in love. In the start you both didnt accepted it and instead of following your heart, you started fighting all the time. It was a hard period for both of you cause all you did is fought while you were in love and didnt even realize it. Though it happened, you both realized the feeling you had for each other and started something.... something that you had to keep hidden from everyone since you were basically "siblings"