HolyScheisse If you want to read about a German protagonist, try my novel: https://www.webnovel.com/book/14348658506135305/Auntie-toasts-the-VRMMORPG
(LitRPG, more funny than dark; mature not because of sex, but the age of the protagonist)
Awkwardly translated German proverbs are included XD guess you like that according to your nickname XD
Need some new novels to read
HolyScheisse
https://www.webnovel.com/book/13276920906343905/Not-So-Confident
relatable characters, and assuming that you like "dark"... I think you'll like the childhood arc :)
I just started this story, but I tried to make it a bit different from the cliches?
https://www.webnovel.com/book/14689633206379005/Crocodile-Tears
A little romance won't harm 
Link: https://dynamic.webnovel.com/book/14567282606865905
Title: I deserve a second chance
Genre: Romance (of course! ヽ(｡◕o◕｡)ﾉ. I'm a romance fanatics)
HolyScheisse Try my novel, Duality.
Genres: Fantasy, Action, Mature
SYNOPSIS: John was a secret agent before he died while avenging his little brother. But death was not the end for John, as he had the chance to reincarnate in another world. Now watch him grow from a slave's son to a hero and a legend.
Hello everyone! ♪～(´ε｀ )
I realized that webnovel has many many talented writers, and definitely many avid readers.
I have spent a lot of time writing something that is dear to my heart. So I need genuine reviews for me to write better.
I'm so tired of Cinderella sisters, with mighty CEO and face slapping. My story is for the calm and silly romantics (like myself 
)
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Link: https://dynamic.webnovel.com/book/14567282606865905
Title: I deserve a second chance
Genre: Romance (of course! ヽ(｡◕o◕｡)ﾉ. I'm a romance fanatics)
Tag: Handsome male lead, Business, Female MC
Synopsis:
A very handsome guy suddenly told me that he is pursuing me??
Shao Yan has been divorced for two years, and she wondered if she can grab this chance at love again?
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Please leave me a review, and let me know your book. I will read it and also leave a review for you!
Thank you! 
HolyScheisse
Try this...
Title: Forced Transmigration!!!
Link: https://m.webnovel.com/book/14679560806348005
TWISTED LIFE IN KOREA, SUPERNATURAL STRONGEST BEING AND TABGLED JOURNEY IN HARRY POTTER.
https://m.webnovel.com/book/13824940705480805
Title: Son of the Spirit Beast (SSB)
Genre: Xianxia
Synopsis:
In a world where the strongest beings are represented by cultivators, Hei is born under special circumstances and is raised by a spirit beast spider. With the body of a human but the mind of a spirit beast, Hei will try to make his way in this conflict-filled world following his convictions and trying to protect those he loves.
HolyScheisse you could try mine i don't have many chapters yet tho..
10 days later
HolyScheisse
You could try mine out but sadly it's not up to 200 ch coz still a student in Highschool so it's really hard to update but it does fit in the criteria of dark and no harem
[https://m.webnovel.com/book/13097477805683205]
2 months later
Mature? Well... The casts are mostly 20+ of age (and I plan to continue doing so) so this novel could be of interest to you. But it's still less than 100 chaps.
With that being said, please let this shameless immortal shamelessly promote his first shameless immortal book:
https://www.webnovel.com/book/11654924005467705
Title: The Bastard In The Zombie Apocalypse
Tags: # Weak to Strong # Action # Zombies # Apocalypse # Level System # Antihero Protagonist
(please note given that this is an ongoing novel, I will be adding other tags in the future)
Synopsis:
"I am a Chosen One! I refuse to bow down to society! Society must bow down to me!"
Nathan is your average 24-year old man. Just like everyone else, he experienced both pain and happiness in his life which shaped him into the man who he is.
One day, God unleashed a zombie apocalypse and gave humanity the System that allows them to level-up, forever changing the world.
Among the humans, there are beings called Chosen Ones who are slightly better off than the average humans.
Follow the journey of a man who slowly descends into madness as he survives in a zombie apocalypse and rises to power.
Please give it a try if you have time.
Thank you!
Hey! I see you like fantasy, but have you tried eastern fantasy like cultivation and xianxia? If you have or have not come check mine out!
Title: Beyond The Primordials
Genre: Eastern Fantasy/Xianxia/Cultivation
Link: https://www.webnovel.com/book/15210648305420705
Synopsis: When Yin Hui was born, the heavens trembled. Out of fear, the primordial gods crippled his clan and himself, stripping them of their ability to cultivate. Rendered powerless, his clan was driven to near extinction and Yin Hui was condemned to a life of slavery. After 15 years of servitude, he encounters a stroke of fortune that would change his fate forever, bestowing upon him an alternate method of cultivating. With a new lease on life, he exacts vengeance against all who wronged him, and strives to ascend beyond the primordials!
Lmao not sure whether you're genuinly asking for novels or making place for people to promote their own. So, I'll do both:
Some good ones are:
ISSTH, RI, generally all of Er Gen's Stuff, Chaotic Sword God is pretty good if you look past the short chaps.
Now for self promotion copy pasta lmao:
I'd love to have some new people read my novel lol
Title: Reincarnated as God
Genre: Eastern Fantasy
Tags: #system #cultivation #fantasy
https://www.webnovel.com/book/15312996906951605/Reincarnated-as-God
:D
HolyScheisse I would recommend my story (shameless author here)
Title: The Emperor who loves me dearly
Hi would you like to give try on my novel ?
" my possessive lover "
dumdum007 thanks!