Ookawabata Tanteisha sets up office along the Sumida River. This detective agency is very small, with only Receptionist Megumi, Investigator Muraki, and the Director. The first client is Wakagashira Yabe, who is concerned about his dying boss. He boss only wants to eat wontons from the culinary visionary Cho Raku in the Asakusa district. However, the wontons have made hime deathly ill, and Cho Raku is already out of business.

Muraki was taking a nap on the office couch, jumped up suddenly. Apparently he had a shady dream. A bewitching woman in a kimono came to the office and asked a strange question "I want to find a love hotel where one room is visible in the mirror of the next room over." Muraki and Megumi scour the ole hotels in Asakusa one by one dressed as a couple. While it is not hard to find love hotels finding the clients hotel is hard.

Mikiruns a cosplay specialty store. Takeuchi is a customer, and she has a background check done on him. She ask him to hang out with her, and they watch TV together. One day Miki makes a request for a strange relationship. She ask Takeuchi to date her for marriage. This makes Takeuchi anxious because they are so young and she wants marriage. For some reason an investigation is needed.

A middle aged man enters the office saying "I want to find a woman." The woman in question is idol star Momonoki Marin. He feel in love with her several years ago when she performed at the local shopping district. Murata begins the investigation immediately, and stumbles across some surprising information.

A man with a scary face has always wanted to participate in the scary face Grand Prix. However, it is not known when or where the competition will take place. He enlist the help of the detective agency to find out for him.