TV-Series
Description
Shunka Hiiragi attends Keimon West Private High School as a third-year student. She possesses an average height and bronze hair with black highlights, styled in a chignon with bangs and two side strands framing her face, complemented by striking red irises. Her standard school uniform consists of a short-sleeved white blouse, a red bowtie, a red suspender skirt featuring white stripes, black-and-white striped knee-high socks (later replaced by pink ones), and black shoes. For gymnastics, she wears a white-and-red v-neck shirt with red underwear, and dons a blue one-piece swimsuit for swimming classes. Her physical measurements are a 78 cm bust (B cup), 54 cm waist, and 76 cm hips, with bruises on her chest serving as visible remnants of past bullying.

Shunka exhibits concern regarding her breast size and holds extensive knowledge of anime and Japanese voice actors. Discussions about these passions absorb her attention so completely she becomes oblivious to her surroundings. She openly expresses a dislike for cockroaches. Her past includes severe bullying during junior high school, leaving lasting emotional and physical scars that complicate her interactions with others in high school, despite forming friendships there.

Her key relationships stem from shared trauma and interests. She bonds deeply with Shota Doi over mutual admiration for the idol group "the Q's" and their parallel histories of bullying. This connection leads to intimacy where they reveal their wounds to each other. She clashes frequently with Rikka Yanagi due to competition for Shota’s attention, resulting in arguments and physical confrontations. Shunka maintains a friendly rapport with Akira Todo, collaborating during events like the swimming competition and sharing subsequent stays in Shota’s room.

Her experiences unfold within the school's environment in 2045. Sitting near Shota in class, she participates in athletics. A conversation about "the Q's" sparks their initial connection. Later, she fails to win a raffle determining Shota’s next roommate. She later encounters Shota in the janitor’s room, where they confide their bullying experiences, culminating in physical intimacy symbolizing mutual healing. Conflicts arise when Rikka intervenes in their relationship, prompting Shota’s temporary flight. Shunka participates in school competitions, losing a swim race against Akira by 0.31 seconds and later competing in another swimming contest for Shota’s attention. She engages in group activities, including bathing and mating sessions with Shota and classmates. Following a terrorist attack on the school, she visits Shota in the hospital. She relocates to the Mating Facility, observing interactions like the reunion between Chifuyu Kuroda and her sister Maria. Her continued involvement with Shota includes sharing candy through deep kisses and further mating.

Her name derives from the Japanese word for "spring" (春). She has blood type A and ranked eleventh in the series’ first female popularity poll.