I'm in a Novel, Becoming a Demon Lord Under My Little Sister's Guidance

When Ouyang Feng woke up, he had transmigrated into the fantasy novel his younger sister had written. Even worse, she'd made him a stepping stone for the protagonist.

Not only would his childhood sweetheart have a child with the protagonist, but he would eventually fall into evil and be torn to pieces by the protagonist.

Ouyang Feng spat out a mouthful of blood. This damn plot was way too vicious!

Fortunately, the notebook his sister had given him for his birthday had transmigrated with him, and he could use it to communicate with her.

So...

"Right, go to the back mountain and find a tree struck by lightning. Then turn left three times and you'll enter a secret realm. There's a divine-grade cultivation technique in there."

"What, pills? Go to the market in the east and find an old man surnamed Xu. There's a ring on his stall, and it's filled with countless pills, enough for you to eat like candy."

Finally:

"Also, don't forget to find the Moonlight Box. It's a divine artifact that lets you travel through space. I want to visit that world for a vacation, too."

Ouyang Feng had only one thought: "Where's the female lead?"

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.