I'm in Another World, My Sister is the Reincarnated Demon King

[Another world + system + villain + multiple women]

Jun Wangyou traveled through time and space and was still in the womb, but he didn't expect that there was another fetus next to him. However, this fetus seemed a little weird!

A faint black aura emanated from her body, and a cold and dangerous aura appeared from time to time, making Dejun Wangyou a little frightened.

"Oh my god, having another sister is nice, but why do I always feel like she's malicious towards me?"

Fortunately, at this time, Jun Wangyou bound himself to the Supreme Sign-in System, which also gave him a glimmer of hope to survive!

Jun Moxue was originally the Supreme Demon Lord in the upper realm of the devil, but was betrayed by his subordinates, tragically plotted against and forced to reincarnate!

However, when she just regained consciousness, she found that someone was actually sharing the pure innate spiritual energy from the mother's body with her. How could she, a Supreme Demon Lord, tolerate this?

Jun Moxue secretly decided that once she recovered a little, she would definitely teach this naughty brother a lesson!

However, before she could do anything, something unexpected happened!