The default costume of Holostars English's Gavis Bettel, as seen in post #5963778.
It consists of a black top hat, a multicolored coat, black gloves, and thigh boots with high heels and a hole for toe cleavage. Without his coat he wears a white shirt, a black corset with coattails, and black shorts, which combined with his thigh boots gives the impression of zettai ryouiki.
This tag implicates gavis_bettel (learn more).