Isekai Gourmet Tsumamigui!

Years after a hero defeated the Demon King, travel between the modern world and another world has become possible. Investigator Kogarashi travels in search of the hero’s legacy while indulging his passion for unusual foods. But eating the other world’s delicacies activates an ability that attracts its residents, turning his culinary expeditions into romantic complications with married women.

(Source: Kadokawa, translated)