I'm looking for a novel that has no romance or harems... preferably a male protagonist, something I can casually read, examples would be I Alone Level Up, I am the Monarch, Trash Of The Count's Family, Star Rank Hunter, and How to Live as the Enemy Prince...
I Alone Level-up does have romance though. Just...it mainly happens off-screen after a timeskip mentioned in the extras. Does Youjo Senki count? I recommend the manga adaptation if you do plan on reading it. But both the anime and novel are amazing, just the manga is legendary. The Lazy Swordmaster feels like it doesn't have romance at all...but it does have the "romantic subplot" tag so maybe he fucks his maid sometime in the novel? The King’s Avatar - It's completed, but like I Alone Level-up you won't find all the chapters here. But you'll get it easily if you just google it. This is one of the best novels on this site, you should really check it out! Virtual World: Close Combat Mage - Same author of the previous one. And if you're ok with it having a minuscule amount of romance, I recommend The Legendary Moonlight Sculptor.
Reverend Insanity lol. Not just No Romance, more like the MC is Anti Romance. There's probably a backstory for he's like that tho but that hasn't been explored yet. If you haven't read this yet, it will keep you up late at night for days on end if you happen to like it. Try it out.
the wolf won't sleep Live Dungeon! Goblin Kingdom female protagonist, but I still recommend: kino no tabi I Was a Sword When I Reincarnated A Wild Last Boss Appeared