My Grandfather, the Master Detective Episode 3

The story's protagonist is Kaede, an elementary school teacher who loves mysteries. Her beloved grandfather, a former elementary school principal who raised her, was the one who introduced her to the joys of mysteries. However, now 71 years old, her grandfather suffers from Lewy body dementia, and it seems that he occasionally sees strange, unreal scenes...One day, Kaede, his granddaughter, talks about a strange incident that happened around her, and it leads her to notice an unexpected change in her grandfather. When the topic of mysteries comes up, her grandfather solves the puzzles logically and brilliantly, as if the truth is unfolding before his very eyes. It's as if he sees a world invisible to others, and therefore can see stories that others cannot. He is like a master detective, building logic to deduce the truth! From then on, Kaede begins to bring everyday mysteries and incidents that come her way to her grandfather's house...(Source: TV Asahi)~~ Adapted from the novel "Meitantei no Mama de Ite" (名探偵のままでいて) by Konishi Masateru (小西マサテル).