Also known as: 女児服, 大人なのに女児服着てる, 女儿服
Cute young girls' clothing (such as Kindergarten Uniforms, Randoseru and brands like Mezzo Piano) being worn by people outside the intended age demographic.
Usually considered to be a subcategory of the Heisei Retro style. Derived from the hashtag "大人なのに女児服着てる" (otonananoni jojifuku ki teru) - "even though I'm an adult, I'm wearing girls' clothes".
This term is sometimes also used to refer to the heisei retro style in general outside of Danbooru (especially in the west), but this tag should not be used on pictures of children such as post #8895336 - these can be tagged as just Heisei Retro.