Chapter 54

Monster Musume: Everyday Life with Monster Girls (モンスター娘のいる日常, Monster Musume no Iru Nichijou) Chapter 54 is the fifty-fourth 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 August 14th, 2017, by the Japanese publishing company within the seinen manga and anime magazine,.

The chapter was later gathered as part of the series' tankōbon volume Monster Musume: Everyday Life with Monster Girls Volume 13.

Plot
The Black Lily Advanced Materials Laboratory and the "Kurusu Residents" unite to save Suu from Nega Suu and contain the rampant slime.

Key Events

 * The mysterious creature is revealed to be a giant Black Slime.
 * As explained by Mr President, he originally had no plan to bring Nega-Suu to Japan. His associates found the Black Slime on one of the Black Lilly cargo ships heading for Japan, although they had no explanation of how it got to the ship.
 * Since Nega-Suu wanted to go to Japan for unknown reasons, and Mr President was also interested in slime samples, he smuggled the Black Slime to Japan. Since the normal procedure would have cost too much time and money, Mr President filed an exception under "new materials for expo used".
 * Mr President used the dangerous Liminals as a distraction so he could smuggle Nega-Suu into Japan privately and secretly.
 * More information about Slimes are revealed:
 * Slimes are drawn to each other, or are able to sense each other.
 * By absorbing a small piece of an intelligent Slime, another Slime can gain the ability to form a humanoid body form. Nega-Suu gains this ability after absorbing a small piece of Suu's body in Chapter 52.
 * Slimes keep splitting and merging with each other. In doing so, a strong Slime mixes it's body with a Slime that has gained experience to creature further offspring that are both strong and intelligent. Since Suu is a Slime with who has gained a lot of experience, Mr President suspects that Nega-Suu wants to absorb Suu.
 * Mr President suspects that Nega-Suu only wanted to come to Japan to absorb Suu, although this assumption leaves open the question of how Nega-Suu found out about Suu in the first place.
 * If a Slime absorbed another Slime, anything unique about the absorbed Slime will disappear and it will cease to exist. So if the Black Slime managed to absorb Suu, she would die.
 * Lala manages to recover her head from a storage facility.
 * Due to Lala's antics, Suu accidentally absorbs a dose of a Honey Bee's Royal Jelly, causing Suu to once again grow to giant size.
 * Because the Giant Slime endangered Kimihito, Giant Suu prepares to fight it.