Isekai-Cafe Terrace.

When a teenage boy went back to his hometown, his grandmother, who had been the new master of an old cafe that was well-known in the area, was the owner. However, he never would have imagined that his life would completely change after realizing that this ancient cafe was not like any other and that, depending on the master level, it had a system that connected to numerous isekai worlds. After that, he started living his real life, receiving visits from wealthy aristocrats, princesses, and queens who wanted to sample his new recipe and food.