Bailonz Street 13 - Chapter 159:

The head of the London Association of Mages, the most powerful Saint Archmage in the world, Audrey Davis, accidentally transmigrated to another world due to a magic accident. She was an 18-year-old human girl.

Meet Damon CrossAs a child, Damon Cross had to deal with the horrible realities of domestic violence and being homeless.He and his mother, who had always been there for him, struggled to find security.After losing his first backyard fight, When Damon gets a new MMA system, his luck changes dramatically.This mysterious system becomes his guide, improving his skills and raising him into the world of mixed martial arts.He learns more about mixed martial arts and gets better at it with the help of this system.With this renewed strength, Damon is determined to not only move up in the fight world, but also make a better future for both of them as a way to repay his mother for what she did.[YOU HAVE AWAKENED THE EMMAC SYSTEM][CONGRATULATIONS TO HOST FOR BECOMING A DOUBLE CHAMP]witness how Damon goes from a Bum to a Champ.Romance: YesFights: Yes

The story is about a a hitman, Who dies because of his own recklessness and transmigrates into a game he used to play after his retirement as a hitman.I'm not gonna spoil any further, but i might answer few of your questions.Is MC overpowered?Nope, he'll become strong over time and all battle he'll fight will be because of his effort and techniques.Is there magic and adventure?Yes! It have both magic like normal isekai with adventure and fighting with monsters and many other things. There are other important things like “Essence Stone” But let's talk about it in the chapters.There will be harem?Not really, He will be in contact with many beautiful female and males but one waifu but i haven't decided yet.All i can say is, give it a try, I'll try my best to make it worth your time.

“Destiny is a matter of Choice not Chance,

It is not a thing to be waited for but a thing to be Achieved”

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The story sets in a mana blessed world, Planet Vermillion, where every being possesses a System.

At the edge of his life, Zero, a man without a System, finally loses everything and embraces his death with a tired yet relieved expression.

As if by fate, the owner of the system approaches Zero through a screen and gives him a chance to connect with the System, however Zero denies it in exchange for a chance to change or undo all the mistakes he has done in his life.

The owner of the System accepts Zero’s wishes but at a certain price and sends Zero back into the past.

Still without a System, but with the knowledge of the future and various skills honed over the years, Zero begins his new journey to change everything he could.

Save everyone who needs to be saved and kill everyone who needs to be killed.

However, the more he moves forward, the more he realises that the ‘truths’ which he had known in his previous life are much more complicated than what they seem.

Balancing his previous beliefs and the new found mysteries that could shatter his perspective, he still keeps moving forward despite things getting more chaotic with every step.

As if fate itself wanted him to fall, an unknown disaster approaches him from behind and a familiar screen comes in front of him

[Ummm… Zero. It might be a bit late but… Looks like I have messed up big time]