The default 3D costume and 2nd costume chronologically of hololive's Yozora Mel, as seen in post #3464874. It's quite notable, because instead of getting a 3D version of her default outfit like the other hololive members, she got a major revision of her outfit for her 3D model.
It consists of a black cross-laced bustier with miniature red bat wings on the back, short white detached sleeves with sleeve garters, black fingerless gloves, black short shorts with a see-through overskirt, black highleg panties, a thigh strap, uneven legwear (a black thighhigh with a garter strap and a black kneehigh) and black lace-up boots with wings on them.
This tag implicates yozora_mel (learn more).