You said you hated men, why are your eyes now full of love? - Chapter 21 - Call for backup, huh?

Nobody thought the end of the world as they knew it would come like this.In a dystopian future, 95% of the population was sent to another universe, one resembling the game Jack had played, “Elder Heir Online”.He would've normally enjoyed such an opportunity, but the company 'DiveCore', from his real world, came along.As long as any of them breathed, his revenge wouldn't be complete.Using his knowledge of the game, and willingness to go through the worst to exact vengeance, he will slowly become what he avoided when he played the game in the real world: a villain.

Day 1 of the zombie outbreak.Before I killed a zombie, I killed a person.Anti-social Protagonist Apocalypse Confident...

Leon is an average high school student who likes to watch anime and read novels.
He's about to cross the street, only to be greeted by a truck and died.
But, he got reincarnated as Uchiha yet dead again because Itachi killed him.
Leon got reincarnated again as the grandson of the recovery girl.
He got kidnaped and tortured by All For One.
After his third death, he got reincarnated as a son of Bibi Dong.
In this fourth life, he wants to change his fate to become the strongest.

Note: Please read the tag before reading.
- English is not my first language, so there would be grammatical mistakes in this story.
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Back in 1996, when the daughter of the Old Xie family, Xie Wanying, said she wanted to be a doctor, many laughed.“Phoenix begets phoenix, dog spawns dog. A truck driver’s daughter becoming a doctor is as likely as a sow climbing a tree.”“I’m not just going to be a doctor, I’m going to be a female chest surgeon,” said Xie Wanying.Her words provoked even greater waves of disdain within the doctors' community.Relatives who were doctors ridiculed her mercilessly: “Do you know how high the admission scores are for medical students? Do you think you can make it?”“There are zero female chief chest surgeons in the country. Who do you think you are!”A bunch of people mocked her: “You'll probably only get into a third-rate medical college and end up as a health worker in a small county town. It's easy to imagine what sort of marriage you'll have.”After the college entrance exams, Xie Wanying entered the top surgical class in the country with the highest science scores in the province, with department heads in the Capital’s top-tier hospitals vying for her from her internship beginnings.“Student Xie Wanying, come to our digestive surgery department.”“No, she must come to our urological surgery—”“Pediatric surgery is in short supply of female doctors like student Xie Wanying.”Circles of relatives and friends: …At this time, Xie Wanying independently completed the youngest Tetralogy of Fallot surgery in the country, represented the national association of chest surgery at an international medical forum, and published the world’s first minimally invasive heart valve repair surgery, becoming truly the foremost surgeon in the field of female surgery!As for the marriage concerns that everyone “worried” about:A brother from the Returned Overseas Faction, a hot bachelor within the Capital, changed his QQ profile picture to Junior Sister Xie.The young CEO, a handsome man, came to the hospital every day with flowers, keen to offer a diamond ring.Not to mention, a whole host of suitors had long since worn a path to the Old Xie Family's doorstep...