This is Cafe "DReAMLAND".
Cafe clerk Yatsume has one job: To make drinks for the strange "customers" that stop by the cafe.

Not just any drinks, though: have a wish? With just a hint of blasphemy, these drinks can help make it "come true".

Strange? Maybe. For Yatsume, though, that's just business as usual.

However, after a certain someone drops by for a special visit, Yatsume comes to learn about the secret behind the shop, and the truth behind the whole world...

[From Steam page]