it means "painful" bags, a japanese term. because its painful on the wallet, and how heavy the bag gets

its basically a bag you have to show of you're favorite character(s), or just a series in general. fill it w/ different kinds of merch, lights, whatever you want. its fun!! i have a few myself

and yes, i have a kuroko no basket dedicated one too

LMAO.
so what i mean by my statement above, both are hardcore fans of their series, but its different type of fan/fandom culture & the way the viewer consumes the media, if that makes sense. 😭
some examples (not my pics found them on google lol)