It certainly is. If this all weren't basically a comedy series (and all women, to boot), it'd be pretty damn creepy. Though Hana's certainly a minor and could probably get away with more than Kuki can.
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After all,You don't want to have to visit the police, right?everything...No way! No way! Norway!!In exchange, let me see it.What are you saying!? The swimsuit ones were embarrassing enough already!Just quietly do what I askedAnd nothing bad will happen.I'll return the videos to you, perfectly intact...Kuki-neesan'sYou will do it.Hana-chan... how did you become such a pervert...?