18th Birthday

When you turn 18 you and your soulmate can speak to each other through your minds. While taking a math test, with your soulmate helping you out. Your math teacher stops you in the hall and tells you that theirs a substitute tomorrow. Your soulmate also happens to say he's a substitute. You quickly try and link the two together and the results shock you like no other.
(this story is inspired by trespassers5 on Tik Tok)