MTL - Heroic Death System - Chapter 3 It takes only 72 hours to fall in love with you.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

[Rebirth back to the era of ambiguous death with the bosses]
In her previous life, Jiang Xuening was a standard Mary Su. For the sake of the queen’s throne, she hooked up everywhere and messed with others.
When falling in love with the emperor, the rebel is a backup;
When falling in love with a student, the husband is a backup;
When falling in love with the boss, the subordinate is the backup tire;
When dating a woman, a man is a backup…?
Every day is a Shura field! (wrong)
Anyway, no matter who is the emperor, she will be the queen!
The men thought they had walked into a silly, sweet heart, but they didn’t expect to walk into the fish pond of a scumbag girl, and this woman also worked part-time as Neptune.
Later the palace changed.
she died.
God gave her a second chance.
She vowed to make amends.
I never expected that when I was reborn and [already] started messing around, there was no time to change it! ! !
Jiang Xuening was furious: The thief is playing tricks! My aunt was born with eight legs! Believe it or not, I got angry [beep——]
Myocardial infarction in the sky: what if the ship capsizes again?
Jiang Xuening’s indifferent face: cold salad.
Well, it’s all talk.
How can we break up safely without offending the bosses?
So difficult o(╥﹏╥)o

Remark:
1. HE, 1V1;
2. Su Su Su Su Su Wen, write with a keyboard, don’t come in and scold me;
3. Weibo @Window 时镜.

Content tags: Mistakes, time travel, palace fighting, rebirth
Search keywords: Protagonist: Jiang Xuening ┃ Supporting roles: Xie Wei, Zhang Zhe, Yan Lin, You Fangyin, Shen Zhiyi, Zhou Yinzhi, Xiao Dingfei, Shen Jie ┃ Others: Fang Fei, Su

- Description from novelbuddy

The Third World War has been ended by the efforts of Kamijou Touma. With that, he vanished. With the Magic Side regrouping, the Sabbath for their followers has arrived.

In the headquarters of the Science Side, Academy City’s strongest Level 5 Esper Accelerator has washed his hands off the “Darkness.” Along with Last Order and Misaka Worst, his days pass by peacefully with no sign of GROUP.

Hamazura Shiage has formed a new ITEM with Kinuhata, Takitsubo and Mugino. Peace has come to the hands of the alumni who have “graduated” from Academy’s Dark Side at last… at least until a new evil “first year student” appears before them.

— This is a follow up to the popular Toaru Majutsu no Index light novel series, where Kamachi-Sensei has promised to deliver new premises and give a totally new flavor to the fights and plot developments

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.