Muzui is the fourth fifth by 22/7, as well as the costume associated with it.
The costume consists of a light blue long-sleeved frilled dress, characterized by vertical striped pattern on the lighter sections and a plaid pattern on the darker sections. Accessories include a light blue bowtie with striped or plaid pattern, a breast pocket, white ankle socks, and blue flats. Variations depending on the wearer include details such as a white collar on the dress or replacing the bowtie with a blue or black neck ribbon.