Lol, actually skipped over this first time around thanks to the new volume cover art. It's like the two cover arts were made either by two different artists, or with two separate audiences in mind. Can't say I'm a fan of the new one, but I guess it's just the same story anyway.
@seekermoc the answer is yes, there's a lot of people that really get their jammies tickled by putting dirty laundries together. The majority is just really hygienic, and the others are more of in the line of "Why the hell should I put my clothes together with another person?!" or maybe they feel really awkward with putting laundry together with a girl/guy, which is a lot of people. Especially people that are not related.
So yeah, dirty laundry or not, it's your stuff. It's really not weird to feel awkward or unwilling to put another person's clothes/belonging with your own.