Nightmare Fuel / Mistakenly Saving the Villain

• Everything that happened to poor Yue Wuhuan. When he was eight his father handed him over to Xie Que, who tricked him into signing the contract that made him a slave then handed him over to Jin Feiren, who kept him prisoner and raped him for years.
• The Acacia Seal. When it's branded onto someone's back they can't do anything without their owner's permission. Even if they attempt suicide they won't succeed because their master controls their soul.
• She Yun's death. Yue Wuhuan gives him a pill that leaves him unable to move, then cuts him up while he's still alive and can feel everything.

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