System: Is it wrong to pick up girls from another world

Just so you know this is a Fanfic and I don't own any of the original.
Mc will travel from world to world without any prior main goal in mind.
However, during his aimless travel he had discovered secrets that should have been left unsaid and unknown.
I don't plan on having a super massive harem because that would be pretty unrealistic, I love stories where common sense is applied even a bit.
Also my mc is not a pussy magnet cuz that's shit as hell, bruh.
...

Mc was once a hero back on Earth then he died due to poison from an injury, next is the typical he meets a god but mine here is an administrator even though it's the same.
His Karma was so big that he could wish for anything but our mc decided to act carefree.
He chose Rimuru abilities after he evolved into Ultimate Slime and the !Chaos! in !Nanatsu no Taizai! He wanted to create !Sunshine! but also wanted to be able to recreate the power of demons and fairies so he chose the !Chaos! the one that created the world of Seven Deadly Sins.
His other wish was a system.

...
The story starts on Danmachi 10 years before the cannon.

Mc is basically me, a male version of me if I must say.
He will sometimes behave like a tsundere, careless, airhead, carefree and narcissist.
He is also domineering, cruel, unforgiving, edgy, battle maniac and harsh.
I don't like super kind and naïve boys, I am more into bad boys.
Don't push your preference to me.
The ONLY difference between me and the MC of this FANFIC story is the name Obviously, genius - I'm an idiot and bad at studying, beauty - I am neither a heavenly beauty or a model only a little bit above average, he's a boy while I'm a girl, and lastly he is a fictional character while I'm a real person, duh obviously.