One Piece: Seaside System - Chapter 8: Marine Based -

Shen Weiyi has a younger, boy-next-door boyfriend whose allure lies in his height, long legs, and strong torso. With a wild mind and a talent for flirting, the eighteen-year-old Jiang is impulsive, fun-loving, and fickle, exhibiting both innocent and wolf-like traits at the touch of a button. Beloved by countless girls, he always thought Shen Weiyi, who would do anything at his mere call of 'sister', would forever indulge him, only to find she suddenly doesn't want him anymore.Breakups are breakups; whoever regrets it is a dog.Shen Weiyi, once red-eared and compliant to his every whim, now won't look back, leaving an eighteen-year-old Jiang's genuine liking turning into a resolute declaration of disinterest. 'Jiang,' she says, 'I date for happiness, not for extra headache.'Later, a desperate Jiang tries everything for her, getting injured in the process and lowering himself to the dust, only to see her blooming in another man's arms, which drives him to a jealous rage.Sheng Ting, the genius of the Z University, untouchable and seen by everyone as the embodiment of purity and restraint, had decided the names of their unborn children upon his first glimpse of Shen Weiyi.[Childhood friend VS Sudden love, not seeking the adoration of the whole world but asking to be your one and only exception in life.]

Mu Zhiyan, after being transmigrated a millennium (1000 yrs) into the future, discovered that he was raised by his adoptive parents as a tool for them to access the heritage his (dead) biological parents left behind. When he was at a loss for what to do next, he discovered that his body hosted an additional
pharmaceutical system.

For a chance to return to his era of Earth, Mu Zhiyan decided to practice and practice; he must train the system to full level as soon as possible.

However, reality gave him a slap in the face. The world is dangerous and dreadful, making Mu Zhiyan recall his mother’s words of holding a thick thigh, resulting in him locking his eyes on a cool general…

So the rumored mysterious Mu Master faced General Han with a serious face: “I allow you to follow me, General Han.”

General Han: “…”

- Description from Novelupdates

Hello, my name is Bologue Lazarus, a debtor.The wound on Bologue's face is healing at an observable speed. The blood remaining on his face flows back, and the skin is reattached, as if time is reversing.Faced with the terrified dying demon, he whispered.This is my “blessing”, the “debt” I owe.Sixty-six years ago, with the end of the Scorched Earth Fury, Opus of Oath City rose from the ruins of the Holy City.Sixty-six years later, the Kagader Empire and Rhine Alliance, two colossal entities spanning the continent, are plotting another all-consuming war.Order Bureau, King's Secret Sword, Order of Truth, Corrupted Sect, All Secrets Order... existences hidden in the shadows of history, trying to join this grand celebration.Under the curtain, the devils enjoy the agony of mortals, taste the values offered, manipulate fate, and bestow curses and blessings.Gazing at the mortals who were originally kindred spirits, they loathe and slaughter each other...

On the eve of the millennium, a sixteen-year-old Chinese boy left his hometown and came to Europe just to play football to support his family.

But he didn’t expect that an adventure would make his football career unique from then on.

Twenty years of ups and downs, he has won countless honors, looking back, Ronaldo, Zidane, Ronaldinho, Ronaldo, Messi, Mbappe and many other stars are all shining, But there is only one king of the ball, hanging high in the sky like the sun, shining forever!

(No system, talent improvement + hard training)

- Description from novelbuddy