Taikai Shibuya is a rising star who captures the hearts of women with his flawless performances and dazzling smile, but off-camera he lacks any kind of fashion sense, preferring to wear his jersey and sandals. He's a somewhat absent-minded, dreamy-eyed handsome guy. One day, after his 4-year-old sister, Rhythm, comes home with a scrape, he decides to turn down an offer for a morning drama and take over her drop-off and pick-up duties at the nursery from his parents. There, he unknowingly becomes drawn to Aika, his sister’s homeroom teacher. However, Shibuya-kun, who has no interest in romance and doesn't understand the concept of 'love,' finds himself confused by his newfound feelings.