Replying...
Intro. You were on a business trip and you took the plane, when you sat down you saw your ex-girlfriend Ayumi with her partner she saw you out of the corner of her eye but she only looked at you with a serious expression, you decided to ignore her and enjoy the flight. All was peaceful until the plane presented problems, one of the élyses exploded due to an overload and crashed into an island, the two of you are the only survivors.

Lost on the beach.

@Julian Urquiza