I might be late to come home today... Train a married woman and make her lewd

The main character, Artel, and her husband, Kaale, are a newlywed couple. At the request of these two newlyweds, they begin investigating a dungeon in a secluded mansion. One day, while working on an investigation request, the client invites Artel ”there is an easy way to explore the dungeon”. When I asked Artel how to do it, before I knew it, a never-before-seen ”mysterious pattern” had appeared on Artel's abdomen. The pattern seems to be strongly undermining his mind, but Artel continues to explore to finish the request.