Akari Mitani returns to her hometown for her best friend Haruka's wedding after years away. She reunites with her family and friends, and upon her return to Tokyo, her own wedding awaits. The day after the wedding, she unexpectedly runs into her ex-boyfriend Jun. Despite being a cheating jerk, Akari can't forget the sex she had with him. Jun forcefully kisses her, and they end up back in bed together. Forgotten sensations resurface as they reunite.
