Tensei Shitara Kioku Soushitsu de Curry-ya Datta Ken

The main character "Kusada" lost his memory and collapsed at a mysterious curry shop.
So, the girl "Kochi", a clerk who is very close to the distance,
Meet the store manager "Shiba" who gives a cult-like curry quiz.
What is the store manager's intention, what is the lost memory, and what is the identity of the mysterious curry shop?
"--Even if I regain my memory, the tragedy is just waiting."

[Translated from Freem!]