One day, a delivery arrived unexpectedly at Kobayashi's house. Inside was a package filled with adult toys he had no memory of ordering, leaving him utterly shocked. Checking the name, he found it was addressed to Rina, the wife of his neighbor and friend. Kobayashi had never harbored any sexual interest in Rina, but this unexpected gift planted an unwanted thought in his mind. When he visited Rina's home to return the package, he found himself drawn into a situation he never anticipated. As always, Rina greeted him with a calm, gentle smile. Amid her warmth and his growing confusion, an unforeseen turn of events awaited—.