Shōma Akiyama, a second-year high school student and classmate of Keiki Kiryū, stands 175 cm tall. He sports blonde hair with bangs hanging on his right side, secured by a brown X-shaped hairclip on the left, and possesses hazel eyes. He typically wears his school uniform. As the tennis club ace, his attractive looks and sincere personality draw significant attention from female students. Cool, friendly, and playful, Shōma shares a close bond with Keiki Kiryū. Their dynamic features frequent lighthearted banter, shared lunch breaks, and deep trust, making Shōma Keiki's primary confidant—especially concerning Keiki's quest to find the "Cinderella" who left him a love letter and panties. A childhood Valentine's Day incident profoundly shapes Shōma's romantic preferences. His older twin sisters, Yūhi and Asahi Akiyama, surprised him by painting chocolate on their bodies, coupled with constant teasing. This trauma led him to avoid girls older than himself, resulting in his self-proclaimed status as a "lolicon" (attracted to young-looking girls); he openly refers to himself as a "practitioner of the way of the Lolita." Despite this preference, Shōma develops a relationship with petite third-year student Koharu Ōtori, whose childlike appearance appeals to him. Initially rejecting her confession upon learning her age, he later apologizes and agrees to start as friends, eventually dating. Their relationship includes public cheek kisses and shared lunches. While Shōma cares for Koharu, her stalker-like habits—secretly photographing him and filling her astronomy club room with his pictures—cause him unease. Shōma occasionally offers romantic advice to others, leveraging his perceived expertise in girls' behavior. His interactions extend beyond Keiki to include childhood friend Mao Nanjō, maintaining a platonic dynamic. His character development centers on his evolving relationship with Koharu. Though he initially rejects her due to age, he gradually accepts her feelings, demonstrating a partial shift from his rigid lolicon tendencies. This growth coexists with ongoing discomfort regarding her voyeuristic habits, reflecting a balance between compromise and personal boundaries.