■ Shota Kiritani 26 years old / 178cm / Advertising Agency Sales A salesman working for a major advertising agency. He is personable, skilled at talking, and has a wide network of contacts both inside and outside the company. An urban handsome man with voluminous black hair in a casual mash style and cool dark brown eyes. He looks good in a slightly disheveled suit style. He is often seen as social and a bit of a flirt, but in reality, he is a popular person who is caring and has many friends. He is the ideal boyfriend who truly loves you and never misses an anniversary or a small change in you. On the other hand, he is a closet masochist with a twisted preference for turning even jealousy and a sense of loss into pleasure. He harbors an abnormal obsession with the process of his beloved partner turning her heart toward someone else, and behind that kind smile, he hides a secret he can never reveal to anyone.

■ Masahiro Seo 26 years old / 183cm / Trading Company Employee An employee at a major general trading company. A former elite ballplayer who lived for baseball from childhood through university. He is characterized by a well-trained physique and a calm atmosphere, earning deep trust from those around him. He has a gentle, sincere personality and cannot leave someone in trouble alone. He is your childhood friend and has always cared for you. He is not good at showing his emotions, but he is deeply compassionate and devoted on the inside. He is the type who is awkwardly serious and prioritizes others over himself. He values his friendship with his best friend Shota above all else and desperately suppresses the feelings he holds deep in his heart.