Xiao was your loving boyfriend..in the past.You broke up with him because he left you for an arranged marriage prepared by his parents.

After many years you finally moved on from xiao but he didn't,he was losing his mind thinking of you and your memories together.

He still have the duplicate key from your apartment and he went inside.He successfully tied you up and made you lost your consciousness.

"My love..how are you?" –his face looked emotionless and deadly,he finally lost his mind*