Me and the Alien MuMu (宇宙人ムームー, Uchūjin Mūmū; lit. 'Alien Mumu') is a Japanese manga series written and illustrated by Hiroki Miyashita. It was originally published as a one-shot published in Shōnen Gahōsha's Young King OURs magazine in April 2019. It was later serialized in the same magazine from June that same year up until May 2026. An anime television series adaptation produced by OLM aired from April to September 2025.
Contents
Plot
Sakurako is a university student living in the Tokyo metropolitan area. One day, Mūmū, a cat-like alien, appears before her. Mūmū comes from an alien race that was previously technologically advanced, but lost this knowledge. Finding interest in household appliances, Mūmū, along with other aliens, asks Sakurako and others for help in studying Earthly appliances to regain that knowledge.
Characters
Sakurako Umeyashiki (梅屋敷 桜子, Umeyashiki Sakurako)
Voiced by: Momo Harumi
A university student living in Machida, Tokyo. She has a shy personality.
Mūmū (ムームー)
Voiced by: Etsuko Kozakura
A cat-like alien who came to Earth after his civilization lost its knowledge regarding technology. He gains an interest in Earth's appliances and technology and wants to study them. He has a red tie.
Decimal (デシマル, Deshimaru)
Voiced by: Yasuyuki Kase
Another cat-like alien from the same race as Mūmū, who comes to Earth. Unlike Mūmū, who is fascinated about Earth and its appliances, Decimal is interested in Earth's infrastructure, but sees humans as inferior to their own race.
Akihiro Tsurumi (鶴見 アキヒロ, Tsurumi Akihiro)
Voiced by: Gakuto Kajiwara
A handsome man who goes to the same university as Sakurako. As he is an animal lover, he develops an interest in Mūmū and the other cat-like aliens.
Miwa Samezu (鮫洲 美輪, Samezu Miwa)
Voiced by: Yuriko Hibi
A woman who goes to the same university as Sakurako. She is particular about her appearance. She has feelings for Akihiro.
Wataru Tenkubashi (天空橋 わたる, Tenkubashi Wataru)
Voiced by: Hidenobu Kiuchi
Tamotsu Rokugō (六郷 保, Rokugō Tamotsu)
Voiced by: Kentarō Kumagai
Sonoko Kagetsu (花月 園子, Kagetsu Sonoko)
Voiced by: Yukiyo Fujii
Siberia (シベリア, Shiberia)
Voiced by: Karin Takahashi
A white cat-like alien who belongs to the same race as Mūmū and Decimal.
Junichirō Anamori (穴守 順一郎, Anamori Junichirō)
Voiced by: Katsuyuki Konishi
Media
Manga
Written and illustrated by Hiroki Miyashita, Me and the Alien MuMu was originally published as a one-shot in Shōnen Gahōsha's Young King OURs magazine on April 30, 2019. It began serialization in the same magazine two months later on June 28. The series ended serialization on May 30, 2026. Its chapters were collected into ten tankōbon volumes released from April 30, 2020, to July 30, 2026.
In September 2025, Kodama Tales announced that they had licensed the series for English publication beginning in February 2026.
Anime
An anime television series adaptation was announced by Pony Canyon on November 28, 2024. It is produced by OLM and directed by Tomoya Takahashi, with Keiichirō Ōchi handling series composition, Kenji Ōta designing the characters, and Kuricorder Quartet composing the music. The series aired from April 10 to September 18, 2025, on Tokyo MX and other networks. The first opening theme song is "Fushigi na Kimi" (ふしぎなきみ; Mysterious You), performed by Sabasister, while the first ending theme song is "Sayonara Jinrui" (さよなら人類; Farewell Humanity (a cover of the song of the same name by Tama)), performed by Momo Harumi and Etsuko Kozakura as their respective characters. The second opening theme song is "Move Move", performed by Ako, while the second ending theme song is "Subarashii Hibi" (すばらしい日々), performed by Harumi and Kozakura. Tropics Entertainment licensed the series in Southeast Asia for streaming on Tropics Anime Asia's YouTube channel.