Nekopara Vol. 1 will be arriving in North America and Japan tomorrow, July 4. Unfortunately, the European release has been delayed. It will now launch sometime this month.
The good news is that Switch is region free, so Nekopara Vol. 1 can be purchased on any Switch system. If you’re in Europe and would like to purchase the game right away, you can simply create a North American Nintendo Account and make a purchase on the US eShop.
Thanks to m_t for the tip.