Pay back the 13 years (Aleheather fanfic)

Heather and Alejandro (my bababoi fr) have been rivals for 13 years. They met when they were 3 and 4. No matter how many years they've known eachother they always get in trouble and fight more than even siblings do (me and my siblings fight like thrice a day) and one day they get in detention again. The principle make...