MTL - The Boss of the Apocalypse Disguises Himself As a Cannon Fodder Female Educated Youth - Chapter 12 Clean up the black heart lotus

The protagonist, Winnie (文尼), confesses his love to his childhood friend—the princess he’s been secretly in love with for years—but is brutally rejected in public. His heart shatters, he’s humiliated and ridiculed, and he collapses unconscious. When he wakes up, he vaguely remembers his past life’s memories and realizes he has transmigrated into the world of an otome game he played before. At first, he’s thrilled, thinking, “Nice! I must have been reincarnated as a villainous side character who disrupts the protagonist’s romance, right?” But then… surprise! He’s not just the villain—he’s the “Saintess”!

As the newly appointed 12th Fatui Harbringer of Snezhnaya, with the nickname of the [Ausbilder], or The [Instructor], Bai Luo feels a little uneasy.This is because the Cryo Archon has given him a task: to go to Inazuma as the Snezhnaya Envoy.As a world traveler, he knows full well the consequences of going to Inazuma—he will definitely be targeted by Raiden Shogun.However, if he doesn't go, the Cryo Archon will also target him.So he chooses to employ a traditional technique that everyone tend to use from time to time in his previous world.Slacking off.

Yo, Hi! I’m Frank, I made a deal with a demon to pay me some money for receiving a guest for a few days every week.
I had no idea about what I have done.
On May 1st, Conan ‘the God of Death’ came to my house. I was forced to let him in and we get involved in a criminal case.
On May 8th, Bruce Wayne ‘Batman’ came to me. I was forced to follow him to fight crime.
On May 16th, Hannibal Lecter, The Silence of the Lambs, came to my home. I can only say that I really can’t stand my guests.

- Description from Novelupdates

Jun Xiaomo, notoriously known as “Lady Demoness”, finds herself chained and bound in a dungeon. Her hard-earned cultivation has been completely crippled, and she has no means of escape. Qin Shanshan, a lady she used to called her “close friend”, mocks Jun Xiaomo, revealing that Jun Xiaomo had been used by the people around her. Even her lover, Qin Lingyu was one of the masterminds scheming against her. Jun Xiaomo watches her life flash before her eyes and realizes that she had indeed blindly placed her trust in people. Her naivety had led to her current predicament.

Jun Xiaomo wanted to end it all. However, she is determined to deliver a swan song. Over the hundreds of days tormented in that very dungeon, Jun Xiaomo had painstakingly painted a complicated formation array with her own blood. With a determined look, Jun Xiaomo burns her life force to activate the array. Her sole intent? To bring with her as many schemers to the gates of hell as she could. The bright red light from thearray intensified, and the end was nigh.

…or was it? Jun Xiaomo opens her eyes and finds herself alive again; time had rewound right back to when she was sixteen years of age, albeit only at the eighth level of Qi Cultivation. Armed with the knowledge and memories of her previous lifetime, Jun Xiaomo is determined to learn from her mistakes and bring retribution to those who so deserve…