shouldn't that be Bra, not Bulma?

Buruma and Trunks with ?????

Mcworld said:
shouldn't that be Bra, not Bulma?

That'd make more sense, but the title on Pixiv is "ブルマ＆トランクス" (Bulma & Trunks)

Guess it's the time-traveling Trunks. Besides, Lunatic6 has a point that those two are both undergarments, whereas Bra is, well...

I was thinking in terms of the fact that Trunks and Bra are siblings, just like Panty and Stocking.