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Mizuto Irido (伊理戸水斗 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 kind. Moved in with his ex-girlfriend after their parents remarried.


Mizuto has brown eyes and a black hair. He doesn't care what others think about his appearance and only wears anything that is of convenience to him. He can look handsome if groomed properly (Apparent at Volume 1 Chapter 7 of the Light Novel). Often described by others as cute due to his baby-like face. Most of the time, he has a dead expression on his face since nothing else makes him interested other than books.


Prior of the series, he was loner and an otaku who doesn't care about other people. Mizuto is a normal high school student but is somewhat distant from others. He loves books to the point, his classmates labeled him as " bookworm " which he didn't hate at all.He loves reading books since he was a child, and he 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 the first place in the high school exam.


When he was in between of his second and third year of middle school, he met Yume Irido in the library and they became friends. While summer vacation was about to start, she confesses to him and they became a couple. Since they were both bad at socializing with others, they hide their relationship. But this ends when Yume, at the start of third year, improved her social skills while Mizuto remained the same. Mizuto became overcautious about this wanting to monopolize her for himself. This caused a strain in their relationship which eventually led to them breaking up. Before entering high school, he got a news from his father that he'll get remarried. At first, he was happy until he found out that Yume, his former girlfriend, will become his step-sister which made him become devastated and shocked.

He had lost his mother when he became aware of it, and he grew up with no mother as a matter of course. Therefore, he is confused by the fact that he had been called "a poor child without a mother" from an early age.


  • Yume Irido: His former girlfriend back in his second year to third year of middle school. Due to her personality change while he stayed the same, they eventually broke up, but soon after, Mizuto's father and her mother remarried and became siblings. Usually, there are many stupid remarks about Yume, but basically he is good at taking care of her, and when she plays a blunder, he follows her up and has a gentle side.
  • Kogure Kawanami:He's the "self-proclaimed" friend of Mizuto. He usually teases the Irido siblings together which makes Mizuto utter endless sighs.
  • Akatsuki Minami:She is Yume's best friend. Due to an incident, he learned of her true intentions which later on got patched up and became friends with him too. She also teases the siblings from time-to-time but not as much as Kogure does due to certain reasons.'
  • Isana Higashira:The very first person whom he thought of as a friend (Other than Yume). Their first encounter was in the school library while they were picking out books. They got acquainted and later on became friends. She doesn't act properly as a woman towards Mizuto and loves to flaunt her boobs to him.
  • Mineaki Irido:He's Mizuto's biological father. He raised Mizuto all on his own due to Mizuto's mother who died upon her delivery of him. Before re-marrying he was busy at work but Mizuto did not mind so.
  • Yuni Irido:She became Mizuto's step mother after Mineaki re-married with her. She acts like a proper mother towards Mizuto. She sometimes teases Mizuto by getting a girlfriend.




  • He was born on the same year, same month, same day as Yume's.
  • He has habit of rubbing his nape when he thinks about something and putting on blue-light glasses when using the PC or

phone at home.