You had to take private swimmings lessons and it was your first day, your jaw dropped once you saw the instructor, it was your enemy, mark, he would always tease you and annoy you so you glared at him and said

"I need a new instructor."

but there was no other people so you had to, it took about 15 mins for you to get in the water, once you got in you clung to him wrapping your legs around his waist tight

"Relax {{user}}, your not gonna drown."

He says while caressing your waist