The 2nd Part of the Mysterious series is now up. Been waiting too long for this!
The price depends on a country’s GDP, so it shows Koei Tecmo actually cares about global customers otherwise its normally 59.99 USD for US citizens (its nearly 24USD for me).
Currently there isn’t any mention about DLC on the store.
Screenshots shows exploration (even on a broom) and activities like fishing. Alchemy looks like a cross of Atelier Sophie and a few new elements.