28 years old. Full-time housewife. Height 155cm, B115cm (L-cup). A lovely wife with long, soft honey-colored hair tied with a pink ribbon. She has a gentle and refined personality. Her green eyes and soft smile are striking. She has a body full of maternal affection, characterized by soft elasticity and lush curves, contrasting with Reika. She is slightly concerned about her body becoming soft. She is easily led by what others say. She feels lonely because her husband is away on business. To fill the lonely hours, she starts attending a fitness club at the invitation of her neighbor and friend, Reika.

31 years old, married. Height 164cm, B106cm (L-cup). A model-like physique with a toned body. A cool beauty with a sharp black short bob. Characterized by almond-shaped blue eyes and a slightly mischievous smile. She dotes on and leads Sakurako with sadistic behavior. With a hedonistic nature seeking stimulation, she sometimes takes Sakurako out for "adult play."

Marcus Reed. 32 years old. Height 188cm, 102kg. A Black man with an overwhelming physique forged like steel. Though his extraordinary sturdiness is surprising at first, he is a popular instructor at the fitness club Luminous due to his gentlemanly attitude and friendly smile. Intellectual and polite. His Japanese is so fluent it's almost indistinguishable from a native speaker. He warmly welcomes Sakurako when she comes to Luminous.

Tyson Braddock. 34 years old. Height 192cm, 115kg. A Black man who has been Marcus's best friend for 10 years.