On one occasion, Charlotte Bennett arrives in Japan for her studies under Professor Akihito Aoyagi. Her classmates are captivated by her innocent demeanor, charming appearance, and graceful behavior. However, unlike them, Akihito remains indifferent towards her, sensing that she inhabits a different realm. Nevertheless, when he assists Emma, Charlotte's younger sister who was lost, his life takes an unexpected turn. Following this discovery, Emma becomes fond of him, leading the Bennett sisters to visit his apartment daily. They engage in activities such as playing dominoes, sharing meals, and exploring the city together. As they spend more time together, Akihito and Charlotte develop a romantic relationship despite their initial awkwardness, resulting in a delightful love story unfolding next door.