OVA
Description
Chiharu Shinonome is a 15-year-old student at Zashono Academy, recognizable by her long red hair featuring a distinctive ahoge and her red eyes. She stands 5 feet 2 inches (159 cm) tall and weighs 99 pounds (44 kg), with physical proportions of a 100 cm (F/DDD cup) bust, 55 cm waist, and 82 cm hips. Her bust size undergoes rapid growth throughout the series, starting from 88 cm and exceeding 100 cm, with potential to reach or surpass her mother's 123.45 cm measurement.

As the eldest of six siblings, Chiharu possesses a reserved and innocent personality, contrasting with her more outgoing family. Transferring from an all-girls school contributes to her significant shyness around males, often causing her to cover her chest with her arm due to self-consciousness about her large bust – a reaction that unintentionally draws more attention.

Chiharu develops romantic feelings for Densuke Mifune after their first encounter, where he tripped and landed hands-first on her chest, making him the first boy to touch her bust. Despite frequent accidental incidents where Densuke stumbles upon her in compromising situations (sometimes orchestrated by other club members) or falls into her bosom, she holds no resentment and reciprocates his affection. She expresses that her happiest moments involve Densuke being physically close to her, particularly when sandwiched between her breasts.

Her large bust heightens sensitivity to physical contact; forceful touching or squeezing overwhelms her. Practical challenges include occasionally wearing bras too small, leading to accidental exposure. She styles her hair in various ways, including ponytails or pigtails.

Within her family, her mother Keiko Shinonome shares a similar physical history. Her sister Yuriko Shinonome frequently teases her by grabbing her breasts, motivated by jealousy over their size difference. Her cousin Miharu Shinonome also develops feelings for Densuke.

As a member of the Eiken Club, Chiharu participates in club activities and tournaments, often finding herself in embarrassing situations involving Densuke. One notable incident includes her sadness when he saw her topless during a public physical examination instead of privately.

Additional traits include being left-handed, observed when she sketched the clubhouse. Her name carries potential meanings such as "thousand spring," "wisdom spring," "thousand sunshine," or "thousand blossoms."