UzaMaid!
Episode 13 (OVA)

Misha and her friends go to a hot spring theme park together, with Tsubame and Midori joining in tow. When Misha ends up forgetting to bring underwear, Tsubame vows to protect her decency on the way home. Later, Misha attempts to prove she can carry out the work of a maid, finding that it isn't as easy as she imagined.

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