Meitantei Kouko wa Yuutsu 1 (Hana to Yume Comics)

[Machine Translation] In the mid-Showa period, there was a law in Japan that only those who solved three difficult cases would be granted a detective's license. A young girl, Koko, an apprentice detective, is asked to find out the murderer of a murder threat addressed to Mr. Inukami, the son of a famous family, who lives in a boarding house in Tokyo, Shunjukan. As a "bribe taker" who takes care of the lodger, Kouko is assigned to infiltrate the Shunju-kan and investigate the case. However, she is not a good cook, and she is not very good at deducing the murders, so she has her work cut out for her. What's more, the four lodgers who live there are a bunch of unbelievably peculiar characters...? A new sensation of communal living, deduction, and love comedy by Suzuki Julietta of "Kami wo Hajimemashita" (It Started with God)!

昭和中期、日本には難事件を3つ解決した者だけに探偵のお免状を与える、という法があった――。探偵見習の少女・耕子は、東京の下宿・春秋館に暮らす名家の子息・犬上くんに宛てられた殺人予告の犯人を突き止めてほしい、という依頼を受ける。下宿人の世話をする「賄い人」として春秋館に潜入し、捜査することになった耕子。しかし、料理は苦手、推理も苦手な耕子はてんてこ舞い！しかも、そこに住む4人の下宿人は、とんでもないくせ者ぞろいで…!?「神様はじめました」の鈴木ジュリエッタが贈る、新感覚の共同生活×推理×ラブコメディ！2021年2月刊