Housekeeping Mage from Another World: Making Your Adventures Feel Like Home! Volume 4 by You Fuguruma

An unexpected flooding incident keeps Shiori and company from leaving Silveria Tower as easily as they’d hoped. But that's the least of their worries—they also find themselves helping two sick adventurers on the snowy path back to town. Along the way, they encounter magical beasts, the likes of which none have ever seen before. On top of all this, Shiori has to worry about her first-ever formal dinner party...and she doesn’t even have an outfit!