chapter 4, page 9
there is a teacup hold from a mutant harm and hand in the center of the girls showcase, it seems ike the girl on the left is holding it but is clearly drawn shitty, I guess the artist did some mistake and couldn't backtrack, so they just put somehing that fit the atmosphere.
most artists nowadays use a tablet for their manga and thsi one doesn't seem hand drawn so is really weird for that thing to be there
unless they really wanted to put a teacup in the hand of only one of the girls and just outright sucked at drawing it