Monster Musume

Monster Musume (Monster Musume no Iru Nichijou, often translated as Daily Life with Monster Girls) is a romantic comedy/harem manga series by Okayado. The core premise is to play with the Cute Monster Girl trope and some harem anime tropes for good measure.

The basic plot is that legendary monsters such as centaurs, harpies, mermaids, et cetera are all real and have only recently begun integrating into human society (think foreign exchange students, only more so). Enter Kimihito Kurusu, a high school senior who ends up "hosting" a lamia (snake-person) named Miia more or less by accident. Later residents of his house include Papi the harpy, Centorea the centaur, Suu the slime, Mero the mermaid, Rachnera the spider-woman, and Lala the dullahan.

Oh, and every single girl there wants to jump Kimihito's bones.

Minis from this continuum are known as mini-Suus.

Kimihito Kurusu
The main protagonist. A young man who's left to take care of the house while his parents are abroad, he finds himself saddled with (at the time of this edit) seven beautiful monster women who are all vying for his attention. Most of the conflict in the series is the fact that he can't choose, and the pressure placed on him to pick a girl is stressing him out considerably. The rest of the conflict is him getting hurt by the girls not knowing their own strength.

Personality-wise, he's a very kind and open-minded individual. His niceness and selflessness (often to the point of putting himself in danger) is the main reason most of the girls fall in love with him.

In badfic, he's often replaced by a character from another continuum. When he does appear, though, he's very difficult to get wrong due to the surprising simplicity of his character.

Miia
The first girl to move in with Kimihito, Miia is a lamia (snake-woman). She's clingy, sometimes jealous of the other girls, and very forward. She's also a terrible cook.

Typically, Miia is presented as normal in badfic, and she is rarely OOC.

Papi
The second girl to move in with Kimihito, Papi is a harpy. She is, quite literally, a birdbrain; she's fairly dumb, forgetful, and childish. Despite this, she has great maternal instincts, and unsurprisingly gets along well with children. As a harpy, she looks a lot younger than she is, for the sake of flight.

Much like Miia (and the rest of the girls), Papi is usually completely in-character in badfic.

Centorea Shianus
The third girl to move in, Centorea (sometimes called Cerea) is a centaur. She likes to think of herself as a knight, with Kimihito as her noble master. Most of the humor with her involves her massive chest, which her clothing is usually fighting a losing battle with.

Suu
Suu is an illegal immigrant, as she wasn't brought in by the exchange program. She's ambiguously intelligent, devoted to Kimihito, and rather touchy-feely with other characters when they get wet. She's the basis for the minis of this continuum; see their page for more information on Suu.

Meroune Lorelei
The fourth girl to officially move in, Meroune (sometimes called Mero) is a mermaid. She's a fan of the Little Mermaid, and seeks a tragic romance for herself. For some reason, people tend to treat her like royalty once she starts talking.

Rachnera Arachnera
The sixth girl to move in, Rachnera is an arachne (spider-woman). She's the first signal that the MonMusu continuum isn't all sunshine and roses, as she was essentially sold by her host family. She's bitter and resentful, although she opens up once she meets Kimihito. She also has a bondage kink.

Rachnera is the most popular character thus far.

Lala
The seventh, and so far final, girl to move in is Lala the dullahan. At first, she's presented as a grim reaper figure; it turns out that she's just really delusional.

For spoilerrific reasons, Lala is aware of the PPC and is willing to aid them... provided that her head and body are in the same place.

In Badfic
The general formula for MonMusu badfic is a crossover character switch. Typically, this means that Kimihito is replaced by a character from a different continuum. Because these generally follow the base plot of Monster Musume, however, the canon characters aren't usually that OOC, often acting exactly as they did in canon.

A common charge in MonMusu badfic is timeline disruption. Often, the girls are introduced in the wrong order, or events are altered in such a way that makes no sense with the canon.

All Sues seen in this continuum thus far have been Character Replacements.

Agents Native to This Continuum

 * Kala Jeng - A girtablilu (scorpion-woman) who wandered into HQ by accident.

Missions in This Continuum

 * Agents Valon Vance and Kala Jeng (DF)
 * "Of Poorly Matched Continua" (crossover with Prototype)
 * "Of Timeline Butchery"