It took a while for Seiji to finally calm down.
He then carefully looked over the effects of all the new rooms that appeared.
They all had their own uses. The bathroom was actually the most useless room if you only looked at special effects.
That was because all outside objects that weren't stored in the warehouse would automatically disappear once the user exited the Spirit House without taking the object. So, theoretically speaking, even if there wasn't a bathroom, going to the bathroom in some other room meant that what was left behind would eventually disappear without any need to take care of it.
However, Seiji felt that it was an issue of being a cultured person.