In 'Medicine,' Naoki and his cousin Yayoi share a family visit, with Naoki feigning asthma to escape his cold and heartbreak. Yayoi, perceptive and lively, uncovers his deception and delves into his emotional turmoil. Despite his initial hesitance, Naoki confides in her about his recent romantic setback. Moved by compassion, Yayoi bestows upon him a 'good luck charm' as a gesture of solace.