Oh, come on, Koguma... Sure, she has no choice but to see them, but she's behind you to stop others from seeing this.
Ah yes. That's totally some excuse Hino might come up with :D
And of course you need to take off your clothes to dry them.
Koguma may be small, but Hino really can't just shove her into the drier with her clothes, right?
If we wanted to subject this to a reality check (usually a counterproductive move, I know), if you were helping a shy, soaking-wet friend get their clothes dried, even in a tiny apartment (and I don't think Hino's place is all that tiny) you could first hand them a big towel or a robe for them to get undressed under.
Is this the time to recall that during the study-sleepover Koguma promised to show Hino her body one day? (That was prior to Koguma removing her panties at Hino's request, for those keeping track.)