https://7net.omni7.jp/detail/2110609520
https://7net.omni7.jp/detail/2110609521
Surprise! Nightshade was a PC otome game by D3 and RED, and the Touch Detective game was 3DS puzzle game released a few years ago that was developed by Racjin. The weird thing is that D3's doing the latter and not Success who are already doing Umihara Kawase Fresh! as well as Psyvariar Delta on Switch themselves.
I'm going to assume both will land in the eShop in the west. D3 localizes virtually everything (or literally everything) they put on Switch, so that helps.
Thoughts?
Edit: Just caught that Touch Detective is a THE/Simple Series labeled game, but not Nightshade. Weird.