At least we didn't get black bars till after the bra came off, this time.
Kusora went full stereotypical woman getting upset over her "cross bag" but I think Hasegawa might have been right. The rope-thing hanging from the ceiling looked exactly like the strap on her bag.
On another note, my guess is the bag is to hold the cellphone he got her. How that relates to the puzzle, I have no idea.