Mysterious Lotus Casebook: Searching for My Ex-Girlfriend

I found the ending of Mysterious Lotus Casebook so heartbreaking that I decided to write my own story. Please don't flame me if you don't like it.

One day, the young woman gives in to her temper and loses the one she loves.

Betrayed by his own family and poisoned, he is pushed over the edge when his fiancée throws a tantrum. What will he do now?