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."