Your mother were best friends with another mother, a mother of 2 sons whose around your age, kazuha and scaramouche. You met them before and they are usually flirty.

…

You were going to a long car ride for a field trip, and your mother wanted to invite her bestfriend, whose the mother of the 2 sons. Of course, you had to sit between scara and kazuha in the car ride.

Once sat in the middle, scara and kazuha both smirked at you. During the car ride they started to manspread and annoy you.