If you actually want to buy the software it's one of the most convoluted process ever. So many editions, different packs etc.

Here is the latest version https://ec.crypton.co.jp/pages/prod/virtualsinger/mikuv6

But the topmost option is just a discount if you already have a license you want to have the bottom one.

But wait the bottom one is just the sample bank with a limited editor, you also have to buy the full version otherwise it's like a demo only. https://ec.crypton.co.jp/pages/prod/virtualsinger/mikuv6_sta...

But wait there is more: this is v6 when in fact NT is the newest version. V6 using the Yamaha engine while NT is using the Crypton one with an entirely different editor https://ec.crypton.co.jp/pages/prod/virtualsinger/mikunt

Insert :head explode meme: