Usami Kei
The head of a unit at a leading IT corporation and fiancee of Kagawa Mei. He entered the company through the connections of his fiancee’s father and the rent for his apartment is also paid by his future father-in-law. Kei barely graduated from a second-rate university and realises that he is living beyond his means. But just three months before their marriage, Mei suddenly breaks off their engagement and he experiences the simultaneous loss of his love and secure life! What could be wrong with himself? Can I let this go this way? And he starts thinking about his true self
Aizawa Airu
Her father is a diplomat and she spent her childhood abroad. With her fluency in English, French and Spanish, she now works as a freelance interpreter. She’s beautiful and stylish, and has a vibrant and frank personality. She’s seemingly aloof but is in fact emotional and cannot take a disliking to a person once she likes him or her. She began to date her boyfriend, Oishi Yukichi, because she fell in love with his approachable personality but she gets fed up with his stalker-like behaviour and initiates a breakup. And as she participates in the love shuffle, she begins to realise the reason why her romances have not worked out
Sera Ojiro
A professional cameraman who specialises in gravure. After he dropped out of high school, he roamed around the world and became a war zone cameraman. However, something causes him to leave the battlefields and become a cameraman who specialises in photographing females. Although he’s popular with stylish females, he has little faith that love exists between men and women. He’s now seeing Kamijo Reiko, a married woman. Ojiro is the sort who delves deep into people’s emotions. Then for the first time, he meets the emotionally unpredictable Hayakawa Kairi
Kikuta Masato
A psychosomatic doctor who runs Kikuta Mental Clinic. He is particularly concerned about one of his patients, Hayakawa Kairi, who is suicidal. He meets Kei, Airu and Ojiro who are all staying in the same apartment building, and realises that each one of them is in a relationship that isn’t going well. He suggests a love shuffle to determine whether “affinity is more important than love” and gets Kairi to join. However, Masato has a secret motive for proposing this love shuffle