In the official game, he stood alone in the stands with crutches to watch his team's game. His strong sense of self-esteem and glory made him bid farewell to basketball and the court sadly. Since then, he has given up on himself and degenerated into a bad teenager (but he has no experience of smoking in bad times). He led his juvenile delinquents to teach Miyagi Ryota in the basketball department on the grounds of being "too conspicuous" (in fact, he was jealous that Miyagi could enjoy basketball and give full play to his strength). Miyagi Ryota knew that he had no chance of winning. No matter how others beat him, he took the lead in drilling three wells (causing Mitsui Hisashi's front teeth to break), and both of them were injured and hospitalized.
After leaving the hospital, he took revenge on Miyagi Ryota, and at the same time, he met Hanamichi Sakuragi, a newcomer to the basketball department, and forged a new resentment, so he pointed his finger at the basketball department. Later, with the goal of destroying the basketball department, he led a bad group to the gymnasium, which led to violent incidents in the basketball department.
In this violent conflict, former teammates aroused the past and memories, and Miyagi said that he was "a person who was obsessed with the past and could not extricate himself." In the end, my self-esteem and stubbornness completely collapsed in front of my former teacher, coach Anxi. I knelt on the ground and shouted out my true feelings about basketball: I want to play basketball ... Then I cut off my long hair, abandoned my conceit and pride, returned to the long-lost basketball court and started my ace career again. Excellent talent and sense of the ball soon made it the main force in northern Hunan. As a starter, he participated in the Kanagawa Prefecture Competition and the National High School Basketball League on behalf of Xiangbei, and his position on the court was shooting guard. Due to the gap of two years, physical exhaustion frequently appeared, but relying on strong will and desire to win, he broke through defensive shooting again and again. Its three-point whirlwind in many competitions has become one of the keys to the reversal of the situation in northern Hunan and its victory. It must be related to two years of depravity, so the academic performance is poor. Therefore, after the national competition, Akagi Takenori and Kogure Kiminobu, both senior three students, did not choose to leave the department to prepare for the exam. Instead, I stayed in the basketball department, with the goal of doing well in the winter trials, thus obtaining the qualification of being recommended for admission.
He showed his glory, frustration and resurrection to readers without reservation, and was praised as the most human character in his works. A lot of his famous words were also talked about by people. Ranked second in the second ranking of popular characters held by Japanese weekly Junior jump (Mitsui had not appeared in the original work when the ranking was held for the first time). According to the author Takehiko Inoue, Mitsui was just an ordinary teenager at that time and had nothing to do with the follow-up. The length of the fighting scene in the gym exceeded my reservation. During this period, I gradually fell in love with Mitsui, so I temporarily changed my original plan and added Mitsui as a new member of northern Hunan. Because of this, Inoue expressed surprise that Mitsui would have such a high popularity later. Although not the protagonist like Sakuragi, it is undeniable that Mitsui is also one of the most popular roles in his debut.