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: Every Days with Monster Girls Volume 16.

Plot
While work continues around the onsen, Yukio notes some strange sounds coming from a water tank in the onsen's basement. Meanwhile the dating event continues with great success, with three monster girls (a Succubus, White Tiger and Tetra Arms) volunteering to help out. Later returning to the water tank, Kimihito and Yukio are attacked by a colony of slimes that had been stowed within the tank. Calling the president of the Black Lily Advanced Materials Laboratory, as they were the ones who had provided the tank, resulted in the president denying any involvement in the matter, Yukio took a gamble and released the slimes unto the men arriving for the dating event. While the slime girls initially assailed the men, the assault quickly desculated and the slimes and men began bonding just as they would within the dating event. Additionally, Yukio developed a scheme to use the slimes as workers to clean the onsen.

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".