Mumei is a manga creator recognized as the author and artist behind the original work Colorful na Everyday, also known as Colorful Everyday. The person debuted as a creator through the publication of this work, which is an essay manga that presents a collection of personal childhood memories and humorous observations of daily life. The manga is published by Kadokawa, which has released two volumes of the series.

The work is characterized by its whimsical and comedic style, depicting a range of personal experiences from the author's own life. These episodes include stories about a grade school student receiving a manicure, the first time growing armpit hair, and encounters with a Filipino mother who swings a melon pan bun. The tone is described as both unpolished and cheerful, presented in a colorful and vibrant manner. The manga gained attention on social media prior to its physical publication.

In December 2023, a television anime adaptation of Colorful na Everyday premiered. The anime consisted of a series of short episodes, each approximately two minutes in length, with a total of 26 episodes that aired daily. The original manga served as the source material for this anime adaptation. The comedian Hitomi Maru Takagi of the duo Ponpoko provided the voice for the character representing Mumei in the anime.

Mumei’s artistic identity is closely tied to the autobiographical and essay-style format of the sole notable work, focusing on nostalgic and often humorous slices of life. The creator’s significance in the industry is demonstrated by the progression of the work from social media popularity to a published manga series and subsequently to a televised anime adaptation.