Mizuto Irido is the main male protagonist in the Tsurekano series. A relatively introverted high-school boy with high intelligence and an interest in books of all kinds, he moved in with his ex-girlfriend after their parents remarried. Before the series, he was a loner and an otaku who didn't care about other people. Mizuto is an average high school student but is somewhat distant from others. He loves books to the point that his classmates labeled him a " bookworm," which he didn't hate. He has loved reading books since he was a child and read various works regardless of genre. Therefore, the results in the current country are at the double-digit level of the national mock exam. In addition, his overall academic performance is excellent, and he competes with his sister for first place in the high school exam.