Kawaikereba Hentai demo Suki ni Natte Kuremasu ka?

One afternoon after tidying the Calligraphy Club room, Kiryuu Keiki discovers a love letter addressed to him on a desk. Thrilled at the prospect of finally securing a girlfriend, he eagerly opens the envelope only to find a simple confession of affection accompanied by a pair of the sender’s panties. With this intimate item serving as his sole clue, Keiki realizes that the anonymous admirer must be one of the four girls who assisted him with cleaning duties earlier that day, transforming his romantic anticipation into a baffling mystery. The pool of suspects includes Tokihara Sayuki, the club’s indolent third-year president; Koga Yuika, a library committee member of foreign heritage; Nanjou Mao, a mildly tsundere classmate; and most distressingly, Kiryuu Mizuha, Keiki’s own fastidious younger sister. Convinced that the culprit is among these candidates, Keiki resolves to investigate despite the unorthodox nature of the gesture. Determined to uncover the truth behind this peculiar confession, he embarks on a quest to identify which of these seemingly respectable young women harbors such an unconventional devotion and might ultimately become his partner.