CHIN's

A nerdy guy who fell in love with the voice of an amusement park worker, goes to the amusement park everyday just to hear that voice. He doesn't know who the owner of the voice is, and has tried to catch the person in action, only to have the amusement park close down.
He enlist the help of Muraki and Megumi to locate the owner of the voice by any means. Meanwhile, that amusement park is being investigated for fraud.
However, Muraki is currently undertaking research for the director. The whole situation is confusing to Muraki….

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.

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.

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.