Hanamura Aiko is a skilled lawyer who specializes in divorce cases. She is a warm-hearted person who sympathizes with clients who are suffering from marital problems, but she grew up seeing her parents' discord, and has lost faith in romance and love. She dotes on her recently adopted dog, Sakura, and is enjoying her single life. Shirosaki Kai is the director of a 24-hour animal hospital who deals with life every day. He is loved by staff and patients for his good looks and skills, but he doesn't talk much about himself and keeps people away from him. A year ago, he rescued a stray dog ??that was brought to the hospital and named it "Shogun". One day, while walking Shogun, Kai meets Aiko with Sakura. At that time, the two dogs fell in love at first sight, and the destinies of the two began to change. Woo So Ha is a friendly young man from Korea who is popular wherever he goes. Woo So Ha has come to Japan with a mission and tries to get closer to Kai, and by chance, he also meets Aiko.
L, an angel who’s endlessly fascinated with the human world, gets into trouble when she unthinkingly saves the life of Han Shi Yeong, a man who was meant to die. To make up for her mistake she must guard him on Earth for one hundred days and keep him safe from Hwan, a death god who is required to collect his soul. Both supernatural beings must contend with the knowledge that whichever one of them fails by the end of the hundred days will be erased from existence, and the longer they stay on Earth the further their powers fade and the more human they become.
Singer Hyeon Seok develops problems with his hearing (Menieres syndrome) and has to stop his recordings. He notices a picture of Hokkaido in a magazine and decides to travel there. He eventually arrives in a a small village in Hokkaido for rest. While there, he reminisces about the old days. The owner of the inn offers him a Japanese meal. There he meets a bright cheerful girl named Megumi.
Emilia, a Filipino who arrived in Japan with aspirations of becoming a model, coincidentally encounters Matsuyama Mirai, an aspiring photographer. Their connection deepens as they find themselves drawn to each other. Mirai, intent on immortalising their moments together, diligently captures their essence through the lens of his camera. However, an unexpected parting disrupts the flow of their narrative. Subsequently, the saga of these two individuals unfolds beyond the shores of Japan, traversing the vast sea to the Philippines, where their story takes on new dimensions.
Mika goes all the way to Seoul to see her sweetheart Hyeong Jun who's been waiting for her. She suffers faints at the airport and she mistakes Kim Gyeon as Hyeong Jun due to trauma. Kim Gyeon also ends up falling in love with her, thus disrupting the balance between the three. Their memories start intertwining, but, before long, a tragedy occurs
