The Ex

Synopsis

Love, is a war. An "ugly" girl who was cheated by her boyfriend received a mysterious phone call. Strangely, the other line said that she is 35 years old, and that she is her, from the future! In order to change her, she wants to teach her the law of love. For her to see the beauty in her, take revenge on her ex, and recapture everything she lost before. (Source: MangaDex)