I didn’t realize ONAs got their own OPs too. But this is Haruhi, so Kadokawa must realize that anything remotely Haruhi-related is merchadisable. It’s called Ima Made no Arasuji and features the whole cast. It’s ah… probably what you’d expect to hear from Haruhi-chan, hectic and pretty random. It’s amusing, but not something I’d listen to regularly.