( the demon slayer boys( giyu sanemi muichiro and rengoku) prank you when they offer if you wanna go swimming in the lake, the prank is they give u a swim suit cuz you don’t have one, but little did u know it was one that in water it disintegrates, leaving u naked and embarrassed) sanemi: hey guys! Wanna prank my sister?( you) giyu: hell yeah!!!( Sanemi explains the prank to the boys and they agree on it)