During the summer of her first year in high school, Yuzu Aihara"s mother remarried, compelling her to enroll at a different academy. For a trend‑setting socialite such as Yuzu, this inconvenient shift became merely another chance to forge new friendships, find romance, and taste a first kiss. Unfortunately, her ambitions and flair clashed with the ultra‑strict all‑girls institution, populated by compliant shut‑ins and star‑studying grade‑skippers. Her flamboyant appearance caught the eye of Mei Aihara, the striking and dominant student council president, who immediately proceeded to sensually touch Yuzu"s body while attempting to seize her cellphone.
Exhausted after the first day, Yuzu returned home and uncovered a startling fact—Mei was actually her new step‑sister! Though Yuzu initially tried to be amicable, Mei"s frosty indifference pushed her to tease the newcomer. Yet before Yuzu could finish speaking, Mei shoved her to the floor and kissed her, with Yuzu desperately attempting to break free. Afterward, Mei stormed out of the room, leaving Yuzu to ponder the true nature of her first kiss and the hidden meaning behind the anguish in her new sister"s eyes. She wondered if the kiss was an omen of their complicated bond and future together.
