Yui Tamura is a second-year student at Morimori Academy and part of its photography club, noted for unconventional activities. Sporting light blue hair, blue eyes, nine piercings across his ears and navel, and prominent fangs, he stands 176 cm tall and weighs 60 kg. Born November 21, he lives in Dorm 3, Room 210. Tamura exhibits a contradictory personality. Akemi labels his appearance good but his personality "bad," citing his enjoyment of aggravating others and sneaking up on people. Despite this provocative streak, he demonstrates strong loyalty. He struggles expressing genuine feelings, often voicing the opposite of his intent—especially around romantic interests like Kyousuke Yaguchi, whom he admires yet frequently insults due to communication difficulties. This awkwardness complicates his relationships. His hobbies include taking strolls and harassment; he favors sandwich bread but dislikes ketchup. Orphaned at five in a car accident, Tamura was raised by maternal grandparents who resented his resemblance to his father. Constant conflict culminated in a week of juvenile detention during middle school after heated arguments led his grandmother to contact police. His grandparents later sent him to boarding high school to remove him from their home. In elementary school, transfer student Ayato Yuri's provocative behavior initially repulsed Tamura, who bullied Yuri with derogatory names. Yuri persistently sought friendship. One rainy day, Yuri invited Tamura home, where Tamura cooked for them. When Yuri transferred again near sixth grade's end, Tamura claimed happiness about his departure, prompting Yuri to kiss him. They later reunited at Morimori Academy. Tamura joined the photography club at Yuri's suggestion but opposed its sexual activities, protesting sex with older male students. After failing a monthly club quota, third-year members subjected him to a traumatic gang rape, deepening his emotional struggles. His loyalty and complex bond with Yuri endure. He engages in both dominant and submissive sexual roles, identifies as bisexual, and his background continues shaping his interactions within the club dynamic.