If you're looking for manga similar to LIFULL HOME'S CM: Sumai Sagashi wo Smooth ni, you might like these titles.
Marina Kanoumaru, a high school teacher is and leader of the school's "Japan Mystery Club". This time the subject of investigation at the mystery club is the Kappa of the village Minakami. However, the supposedly leisurely trip to Minakami turns into one murder case after the next! And Marina finds herself in danger!!
Memetan, a detective who sports a yellow romper better than nobody else. This comic will leave you laughing in disbelief as it follows the bizarre daily life of the ever capable detective, Memetan, who despite being a baby, is unpredictable and is always chasing down criminals. Anybody who's anybody in Tottori-ken knows Memetan!