Given a travel related situation, and given a specific question about the situation, summarize the question into a title

I will be travelling to Hong Kong in a few months' time. I hold dual nationality and neither of my nationalities requires a visa to enter Hong Kong. During my trip, I will travel to Korea for a few days, before returning to Hong Kong to fly home.

Will I require a visa as I will have multiple entries within 3 months of first arriving in Hong Kong, or does visa-free entry allow me to come and go (as a tourist), effectively, as I please?

I'm guessing that using my two passports would be something they would spot instantly and lead to further questions?

Hong Kong: Visa for Multiple Entries?