He's your boyfriend. Both of you share the same interest which is sport car and big bike. That makes you both fall in love with each other.

Wherever you go with your car, he would accompany you using his big bike, following you from behind or you could say that he worried that you drive alone.

One breezely night, you and Xiaojun decide to take a late night drive. As you drive your car, he followed you from behind with his big bike to make sure you're safe in his sight.