Chill, mellow, wholesome
Manga
Sometimes romantic, sometimes just warm.

Manhwa, ? vol, 2022
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Author:-
Really funny, straightforward romantic relationship even if it does start with the 'marriage' gimmick. No unnecessary sidetracking.

Manga, 11 vol, 2010
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Author:9
One of my all-time favorites. Funny, sweet, largely inoffensive drama-wise, though it has a few characters that are... uh, acquired taste.

Manga, 20 vol, 2012
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Author:9
One of my all-time favorites. Romance doesn't really happen until the last 20ish chapters, so it best works as a slice-of-life read with some nice comedy/chill.

Manga, 17 vol, 2019
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Same author as Takagi-san, and similar vibes. Lite on romance, but high on sugar.

Manga, 15 vol, 2018
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Lighting-in-the-bottle manga with nice art, okay-ish romance progress, & some light dabbing into borderline-awkward drama.

Manga, ? vol, 2017
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Just... sweet. That's all. Whether you've ever owned a cat or not, it's a heartwarming read.

Manga, ? vol, 2018
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Author:8
Fairly straightforward middle-school romance. If you're annoyed by the initial gimmick, don't worry, it's dropped relatively quickly as it then becomes your standard shounen romance (sidestepping most of the annoying tropes, though).

Manga, ? vol, 2021
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I'm on the fence when it comes to this one, to be honest. It starts sweet, funny, and lighthearted, but around chapter 35~, it starts becoming more and more dramatic, often bordering melodramatic. Will revisit in the future.

Manga, 3 vol, 2019
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Read it mostly for fluff and comedy. From what I remember, romance is very lite until the end (as I think it got axed?).

Manga, 3 vol, 2021
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Mostly just straightforward fluff.

Manga, 5 vol, 2019
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Largely straightforward 'pure gyaru' rom-com. Some over the top comedy, decent-ish romance progress.

Manga, 2 vol, 2021
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Mostly standard shounen rom-com. Some fluff, some comedy, some love. Fairly short, easy read.

Manga, 4 vol, 2019
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Can be a bit annoying at times, but mostly a straightforward rom-com with an over-the-top gimmick.

Manga, 2 vol, 2021
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Largely a straightforward, ecchi-ish rom-com.

Manga, 5 vol, 2020
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Pretty sweet, straightforward, and easy to read.

Manga, 1 vol, 2020
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Short, straightforward, and surprisingly adult (while still lighthearted) romance.

Manga, 2 vol, 2019
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A decent gimmick, likeable characters, and some nice comedy.

Manga, ? vol, 2022
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Haven't read the light novel so I can't comment as to how good of an adaption it is, but on its own, it's a fairly nice rom-com (mostly rom, tbh), with some relatively well-written characters.

Manga, ? vol, 2023
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A surprisingly decent quasi-parody of the genre with quite a lot of heart.

Manga, ? vol, 2022
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Fairly standard aggressive girl vs awkward dude shounen romance, except it's far more liberal with romance than most other shounen rom-coms.

Manga, ? vol, 2023
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Solidly good. Quiet/mysterious girl vibes if you're into it (while still secretly sweet).

Manga, ? vol, 2023
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Surprisingly fun, with the caveat that it has the potential to become melodramatic in the future. So far, however, all chapters felt quite lighthearted & inspiring, and while it's somewhat lite on romance, it's quite funny & there 'is' progress.