From a famous chinese author, the novel "Martial arts master" (not to mistake with a crappy manhua Martial master)
It was one and a unique romance where there is near 0 drama. No young master, no love rival, no kidnapping, no family not agreeing, no clan, no sickness (a minor one though), etc
It was ranked top10 for years among chinese ranking of urban novels before.
While the boom of isekais and the trend of cultivation, and so many shit faceslaps novels, this novel was at that time the ONLY novel that cattered to male readers where you only had pure, ENTIRELY PURE, sweetness.
In short, it's mostly MC getting a cheat-not-op that is just supplementary, entering martial path in a urban world that focus on martial arts (kinda like football), and slowly REALISTICALLY coming closer to FL by sending text messages and sending some calls to her and bringing some food, thx to some advices to a best friend knowledgeable with romance (with girlfriend). Could even be used as they are true advices, though small risk of being friendzoned.
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From a (ex)-popular english author Andur, "Beyond" and "Coeus"
This genius author found the idea to always re-use the same MC and FL but reincarnating endlessly. So all the books is their souls but their personalities is not often the same. Some are standalone, some are following a timeline of reincarnations.
MC is a madman scientist, op mage that control all elements + blood + time + soul + necromancy.
While FL is complementary, and is a genius of melee fighting by mana strengthening, witch, doctor, cook ("creating potions is just cooking"), knowledgeable about human body, straightforward, use punches to talk sometimes, can satisfy the chocolate addiction of MC (yes its a thing).
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Heartwarming series
Josei/Shoujo :
https://www.novelupdates.com/series/full-of-my-love-to-you/
jp :
https://www.novelupdates.com/series/the-probability-i-can-kill-my-wife-without-being-found-out/ MALE POV + combo with
https://www.novelupdates.com/series/a-game-to-make-him-fall/ FEMALE POV
Tragedy sounding but in fact it ends perfectly sweetly.
KR :
https://www.novelupdates.com/series/i-dont-like-the-world-i-only-like-you/ adapted into TV-show. The plot is real from the female author = autobiography type with jokes. Anecdotes-style. Censored names to preserve identity.
COUGH R18 female MC :
https://www.novelupdates.com/series/the-civil-officer-can-have-sweet-dreams/
Very very sweet and ......erotic.
Bittersweet but very sweet deus-machina ending :
https://www.novelupdates.com/series/my-husband-with-scholar-syndrome/
= single FMC rebirth in time after dying from a uncurable genetic disease. And decide to accept marrying the autistic childhood male friend she was close with at that time.
Personal SFW yuri :
https://dynasty-scans.com/chapters/forever_girls
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PS : Andur also have genius idea of writing that
MC - FL reincarnated millions, maybe billions of times, but that they never forgot their very first life and love where they lived a sweet peaceful life in a kingdom with a family. The novels basically show the "timeline" where finally at last they encounter each other and discover they are each other but far later. Very moving scene of FL discovering first and confronting MC though anticlimatic axed scene.
Genius idea :
They were great kind people (kinda) at first but thx to reincarnations among the vast multiverse, and having shit lives sometimes, and encountering shit people often,
they became what they are in the novels. MC turning into a sadistic-type anti-hero acting like a kid or oldman. FL turning into a violent woman.
And
decent reason why in the novels they turn out together in same universe unlike before : in early novel, MC did a magic experiment, FL entered without warning, magic experiment screwed up by interruption, the soul magic became a curse(?) that basically link the very core souls of them together. Hence making linking their fates together (and reincarnating close or fate making them reunite whatever the case). Though in a slight-drama discussion later on, it reveal that they are lucky, because this magic/effect is not something to underestimate even if 2 sweethearts/lovers feel they fit together. Because its told that 2 people chose to link their souls, only to discover that later they were not fit together and always fighting-bickering, but as the magic is irreversible, are cursed to reincarnate -> fall in love -> get together -> fight again each other. Not shown and just random anecdote-example told by a character to MC-FL.
Warning the novels timeline is very confusing because Andur sometimes write a plot before or after the plot of latest novel. There is a comment telling the order of reading but still can be confusing. Warning that "Beyond" and "Coeus" are the sweetness and best novels of Andur and others are not lower quality. Warning it can be very VERY gruesome. Like body limbs, explosions, guns, dead bodies etc.