MTL - The A in the Opposite Dorm Always Thinks I’m Pretending to be a B - Chapter 29 29th

In this world, there are people who, despite having both talent and luck, always fall a step short of happiness, and Lin Xiaoguai, unfortunately yet fortunately, is among them.Born in the sixties as the beloved youngest daughter in her family, Lin Xiaoguai was both beautiful and intelligent. However, she was burdened with four mediocre and weak older brothers and four formidable sisters-in-law. Her family background was initially poor, dimming her prospects, but just at the right age, she encountered the restoration of the college entrance examination and succeeded in entering university. Her father, overjoyed by the occasion, went to sleep never to wake again, leaving Lin Xiaoguai devastated and ill. During her high fever and delirium, her greedy in-laws married her off. Fortunately, she met a decent man, but his family proved to be a relentless headache, ultimately costing her the ability to become a mother.Disheartened, she divorced and moved far away. On her own, she carved out a new world in the city, living comfortably and leisurely with money and leisure, but unexpectedly, in her later years, she suddenly acquired a powerful ability that should have appeared decades earlier. Thankfully, her broad-mindedness prevented her from succumbing to depression.When calamity struck, she thought her end had come but woke to find herself back at the beginning.Considering her past, Lin Xiaoguai realized that if she wasted this second chance, she would truly be foolish.

Master martial artists were beings that no one can obstruct. A martial arts expert has been reborn into the body of a genius whose cultivation has been abolished and has been abandoned by a woman. Therefore, he starts cultivating the art of Xing Yi Quan, producing a solar system within his dantian. His innate talent tramples over all the geniuses, and even the geniuses among geniuses.

His powerful spirit and ruthless and ambitious nature, no matter who he is reborn into, will never change! Slaughter is instinctive, being cold-blooded is his personality, exterminating an entire family is only a means towards a goal, cruelty means infamy, and chasing after women… is just an interest.

- Description from Novelupdates

Leiyin accidentally crossed into the One Piece World, and accidentally obtained the Naruto System.

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.