Martial Arts System - Chapter 30: First Step.

A girl who calls herself a demon appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under a false pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.

Cayena, the Imperial Princess, was known as the most beautiful woman in the Empire. She was a woman who knew nothing but evil and luxury.

However, she was destined for ruin: she would be used as a chess piece by her younger brother to secure his throne and killed by her crazy husband.

“I’ll make you the Emperor.”

“… Sister, are you referring to me?”

“In exchange, give me freedom.”

She had to change things before she became that Cayena.

Ever since He Mulan, a 28 year old forensic investigator, transmigrated into the post-army civilian Hua Mulan’s body, she’s been under a lot of pressure. Unlike the folktale ending, there are no flowers or applause to be found here. After leaving the army and returning to her hometown, word by the countryside has painted the now 32 year old Hua Mulan as a homicidal maniac, an old hag, and a freak of nature, among other nasty things. Between piecing together Hua Mulan’s scattered memories, grappling with her fellow villagers’ prejudice against her, and fending off Mrs Hua’s attempts to match make her, He Mulan has her hands full. All He Mulan wants to do is protect Hua Mulan’s body till her soul comes back, but fate has other plans…

- Description from Novelupdates

My end was not majestic, my beginning was not beautiful, but I will make damn sure that I rise once more. No more shall I bend a knee, no more shall I hide, no more shall I cower. No more shall the light guild my path, for only Darkness remains.

***

Killed by the universe's greatest killer, Truck-Kun. My existence was twisted as I gazed up at King-Yama, staring down at me with revulsion, “You sick bastard, you ate people.” He bellowed, glaring at me with disgust.

Snorting, I gathered my courage raising my head high and proud, my voice carrying a hint of pride, “So what, have you ever tried it...Let me ask you, have you ever had sex.”

A bewildered expression hung on his rugged appearance as he absentmindedly nodded. A slight smirk crossed my face as I declared, “then have you ate ass,”

“WHAT!!!” He balled in panic, shivering like a guilty man on trial.

“HAHA, you call me disgusting, but it appears you were sucking ass, now that is truly disgusting. I don't judge, but if you ask me, I will stick to cannibalism.”

“THAT NOT A FAIR COMPARISON, YOU LITTLE SHIT,”