Selena never sat besides justin and they never even tried or thought to sit besides each other . Because Justin knew that Selena hated him so he never tried to . But one day during the monsoon season the rain was pouring and Justin unexpectedly sat besides Selena as there was no other seat left. That day Selena felt something but she didn't realised. That was the first time their body touched. Selena definitely felt something but Justin felt it or not it's a secret.