Young Male protagonist and his fantasy romance. (not a fan of polygamy) It'd be good if he is reincarnated in some game or the like. Something like Trapped in a Dating sim but excluding that harem part. I know fantasy harem all turn into polygamy but if there's some where the protagonist does make a choice, I'd like to read. Edit: okay, so is there anything good in Fantasy romance without harem with teeange protagonist (male)? Edit2: I give up. I'm fine if it isn't fantasy. Action,adventure with different power system and worldbuilding will work too...
My Pet Is a Holy Maiden and I Was Kicked out of the Hero’s Party Because I Wasn’t a True Companion so I Decided to Have a Slow Life at the Frontier Though there is possibility that both of them will become harem later Also I second Ending Maker, it is simply the closest to your criteria except the illustrations. I haven't seen anything better than that in terms of mixing action/martial arts+isekai and romance (that isn't harem) Also if you dont mind female mc aka shoujo/josei then your choices will expand by quite a lot. There's lots of it and most of it are not (reverse) harem
here are the recommendations, although some don't have illustration, some also have harem, but it's just two girls, but it's a good works . https://www.novelupdates.com/series...a-demon-king-i-will-aim-for-world-domination/ https://www.novelupdates.com/series/im-the-evil-lord-of-an-intergalactic-empire/ https://www.novelupdates.com/series/the-best-assassin-incarnated-into-a-different-worlds-aristocrat/ https://www.novelupdates.com/series/the-legendary-rebuilding-of-a-world-by-a-realist-demon-king/ https://www.novelupdates.com/series/the-new-gate/ https://www.novelupdates.com/series/the-simple-job-of-only-perishing-to-the-hero/ https://www.novelupdates.com/series/yuusha-party-no-kawaii-ko-ga-ita-no-de-kokuhaku-shite/ https://www.novelupdates.com/series/the-death-mage-who-doesnt-want-a-fourth-time/ I used google translate so there must be some errors
The Experimental Log of the Crazy Lich - The Mc could have easily go for the harem route (demon goddess, ancient Elf and goddess on par of the goddess of creation) but he stuck with his principles and just only choose one...
highclass-mob on scribblehub( cant put the link very first post sorry bro) its just what u were asking..., but the autor seems to have abandoned the series so read at your own discretion( suffer with me waiting for the next chapter that is never meant to come)
That's just early on (the seemingly harem part) Spoiler I forgot which chapter, but at one time Schnee lost her memory that caused by a PK Player. After her memory returned, Shin started getting serious w/ her & even proposed her
https://www.novelupdates.com/series/the-villains-love/ Fantasy, Romance with illustrations and non polygamy. FL and ML are young, the storytelling is incredible, but to there are mature and dark themes.