A type of hair bun where the hair is rolled using a hairdressing item called a hair donut, rather than coiling hair around repeatedly as seen in the traditional odango-styled hair bun. The resulting hair bun indeed resembles a circular donut.
Not to be confused with hair rings.
The following tags are aliased to this tag: doughnut_hair_bun (learn more).
This tag implicates hair_bun (learn more).