I opened a shop on the Astral Train - Chapter 11

Just like how everyone adored heroes in their childhood, a certain young man adored those powers hidden in shadows. After hiding his strength and living the mediocre life of a mob character by day while undergoing frenzied training by night, he finally reincarnates into a different world and gains ultimate power. The young man who is only playing at being a power in the shadows, his misunderstanding subordinates, and a giant organization in the shadows that gets trampled…. This is the story of a young boy who had adored powers in shadows possibly eventually reigning over the world of shadows in another world.

Mo Chou is the no.1 ranking female assassin in an illusive organization. One day on the way to the organization after completing a mission, she dies. She is shocked when reincarnates into her favorite novel but as a villainess who is the protagonist's step sister and dies a miserable death. She just wants to live a cushy and comfortable life so she decides to completely avoid the red flags aka the main characters and live like a saint (well a saint who is an assassin) But why does she keep stumbling into the main characters especially that infuriating villain and why the heck are they clinging onto her?

Gu Qingmo began to disguise herself as a man because of a word from her master.

Later, because of the words of my brother, I tried not to open my mouth if I could.

Later, I don’t know why the whole cultivation world is talking about the old master of Wanjianzong, the closed disciple of Xiaoyao Sanren, who is cold-hearted, taciturn, self-restrained and respectful, and who cultivates the ruthless way.

Mo Chuli thought so until she died in her hands.

However, since he was reborn and accepted as a disciple by Gu Qingmo, he discovered that——

Well said, cold hearted! taciturn! Self-denial!

It’s all an illusion!

Small snippet:

The day before Gu Qingmo was going to take Mo Chuli out for a training session, the headmaster made a special trip to Jianfeng and said to Mo Chuli, “Chuli, my uncle told you that if your master wants to go out in the future, you will definitely to follow.”

Mo Chuli: “Sect Master, why is this?”

Liu Qingbai: “Your master’s words are easy to offend people, so you have to keep an eye on it.”

Mo Chuli: “…”

[Woman pretending to be a man to decorate the real world’s first upright and paralyzed heroine × Seizing the house after her death was accepted by the heroine as an apprentice and the former Demon Lord hero]

ps: The female protagonist has a ceiling level of combat power, and the male protagonist is a growth type

- Description from novelbuddy

A Speedster in a Fantasy World