Team Up to Break Up

I want revenge on my ex. He wants my ex's Girlfriend. We are teaming up to break them up.

Celestia finds an anonymous person on her phone, who claims to be able to tell the truth to any questions she has, 5 times. She finds out her ex cheated on her, and breaks up with him.

3 weeks later, Celestia meets a familiar boy, and they find out about each other's goals. Celestia wants to take revenge on her ex. The boy wants her ex's Girlfriend. It seemed simple, but the heavy truth behind it is difficult to pry open.

And who would have guessed the real truth behind it all.