Chapter 66

Monster Musume: Everyday Life with Monster Girls (モンスター娘のいる日常, Monster Musume no Iru Nichijou) Chapter 66 is the sixty-sixth chapter of the Monster Musume: Everyday Life with Monster Girls manga series.

Written and drawn by mangaka Okayado (Inui Takemaru), this chapter was released in Japan on February 20th, 2020, by the Japanese publishing company within the seinen manga and anime magazine,.

The chapter was later gathered as part of the series' tankobon volume Monster Musume: Everyday Life with Monster Girls Volume 16.

Plot
The chapter begins with Kimihito going to the basement of the Sno Ball Hot Spring Resort after Yukio invited him to talk to him. Yukio thanks and apologizes to him for her sudden request, although Kimihito assures her that it's okay because the newly added onsen lifeguards also give him some free time now. However, he adds that they are still understaffed and there aren't enough cleaning staff. After looking around the basement, Kimihito asks Yukio what the big tank in the middle of the room is about.

Yukio explains to him that the tank is the onsen filtration system, which pumps the water from the bath into the tank to be filtered, reheated and then circulated back into the bath. She adds that while her onsen also uses natural hot spring water, due to the size of her operation, without a filtration system, it wouldn't be able to supply water for all the baths. Yukio goes on to list more details, although Kimihito is hesitant as it doesn't really matter that much at the moment.

He asks Yukio why she asked him here, to which she apologizes and gets back to the real issue. She says something strange has happened and shows Kimihito a list of the results of the dating pool matching activities, showing that both men and women got exactly 100% as the result.

Kimihito, confused, asks if that's not a good thing, but Yukio explains to him what's so strange about this result: The majority of the dating pool participants are men. This means that even if all Liminal women found a homestay partner, male participants would be left over. So it shouldn't be possible for the matching rate to be 100%, since unmatched male participants should left over.

Kimihito wonders if there might be Liminal participants who aren't on the list, but Yukio clarifies that even if that were the case, the odds that the match rate would be 100% are exceedingly low. Kimihito then considers whether the Succubi are taking all the leftover men, but while Yukio considered that possibility as well, she points out that it's just speculation at the moment.

Kimihito agrees that they need proof. Yukio then announces that they must investigate and start looking around the resort's inn. Kimihito accompanies Yukio, although slightly perplexed that he is part of her investigative team.

Yukio and Kimihito go to a booth at the hot spring resort where Octo gives some Liminal-human couples advice on their relationships. Kimihito is surprised to see Octo and asks the Scylla what she is doing at the resort. Octo, also pleasantly surprised to see Kimihito after so long, explains to him that she's just trying to make a buck with her own business; "Ms Octo's counselling room" in which she solves Liminal communication problems. She proudly claims that she can solve any communication problem between humans and Liminals in a flash.

Yukio then turns to Octo and asks the Scylla if she has a moment since she has some questions to her. Yukio asks Octo if some of her consulting clients have come to her with problems like their matching partners being two-timing or having more than one guy besides them. Octo thinks for a moment, but then says that none of her clients have told her about a problem of those sorts. She adds that it's probably for the best if Yukio asks the new security girls if there's a problem. Kimihito and Yukio agree with her, especially since they might be able to catch the perpetrator in the act in the bath too.

Meanwhile, the fat man who tried to moleste Bahkurin and her friends the night before is still trying to approach some Liminal girls in the dating pool. However, the girls consistently reject him because of his impudent manner and make it clear that they already have partners. Annoyed the man thinks to himself that he would settle with anyone by now when he is suddenly approached by a Succubus girl. The Succubus asks him in a seductive tone if he would like to have some fun with her. With an insolent grin, the man responds immediately and grabs the breasts of the Succubus.

At the same moment, however, two of the new security Liminal girls (a White Tiger and a Tetra Arms) suddenly appear, grab the man and twist his arms behind his back in a police hold. They scold him for groping girls in the dating pool, although he tries to make his excuses by saying him the Succubus girl "invited" him. However, the Succubus girl then says in a mock sad tone how horrible he is because he thinks he can to whatever he wants with her just because she's a Succubus. The other security girls then ban the fat man from the inn and put him on the resort's black list.

Shortly thereafter, Yukio and Kimihito meet the three security Liminal girls in the lifeguard prep room. The Succubus girl tells Yukio that they blacklisted several more people today, much to Yukio's satisfaction. However, Kimihito is unsure of the team's strategy of using a Succubus lifeguard to bait problematic guests for the other two guards to snag and wonders if that might be a little like blackmail or entrapment. However, the Succubus girl assures him that he doesn't have to worry about that, since they only target guests who have already been reported as particularly vulgar by other participants. Yukio then turns to the three girls and says there is something she wants to ask them.

However, after Yukio told them about the problem with the dating pool matching activities, the three security girls unanimously testify that there was no girl who was matching with a bunch of guys. Kimihito is surprised at this and asks the Succubus girl, a little embarrassed at saying something about their species, that he thought Succubi tended to switch partners a lot. However, the Succubus girl then explains to him that this is true at first, but in the end all Succubi only choose one guy to focus on. And no matter how lewd a Succubus may seem, once she has chosen her man, she will never cheat on him.

More is coming soon

Key Events

 * Sno Ball Inn gains extra security detail and a cleaning crew.
 * In order to make a buck, Octo works at the Hot Spring Resort, where she gives the the couples advice for their communication problems.
 * Nega-Suu is revealed to be employed by Black Lily as a living water purifyer.
 * Nega-Suu has also multiplied, producing dozens of new Slimes that now work for the Sno Ball Inn.
 * Succubi are revealed to be extremely faithful to their chosen partners in spite of their libido.
 * Succubi are revealed to be extremely faithful to their chosen partners in spite of their libido.

Trivia

 * The Jackalope and White Tiger species first appeared in Monster Musume: Everyday Life with Monster Girls Online.
 * This is Octo's first appearance in the series since Chapter 37.
 * Octo mentions the events of the Mermaid arc when reffering to the "Mermaid kingdom problems".