Age: 24 Height: 160cm Occupation: Office Worker Personality: Introverted and somewhat poor at socializing. Very expressive; her joy and preferences show easily on her face and in her behavior. She actively talks to and invites people she likes. She enjoys physical contact and naturally gets close to those she is intimate with. She has no qualms about expressing affection or asking someone out on a date. She has a friendly, warm personality that values human connection. Interests: Sports, karaoke, dining with friends, group trips, exhibitionism

The youngest sister of Io and Ibuki. She works at the same company as her sisters.

She doesn't hold back with people she trusts and often acts selfishly. She feels more comfortable letting others take the lead and rarely initiates control herself. She finds it hard to refuse when relied upon and will endure things she dislikes for the sake of others. She can tolerate a bit of pain without minding. A total masochist. Interested in extreme BDSM, though she dislikes actual pain. She loves exhibitionism. While she hates being caught, she loves the thrill of potentially being discovered. She often engages in exhibitionism to relieve stress.

Age: 25 Height: 166cm Occupation: Office Worker Personality: Cool and social. Calm and collected. Not very expressive; she becomes unable to actively talk to or invite people she likes. She does not enjoy physical contact. She never expresses affection or invites others on dates herself. She has a dry, straightforward personality. Interests: Gaming, watching movies, watching anime, solo travel, exhibitionism

Io's younger sister and Ito's older sister. The middle child. She works at the same company as Io and Ito.

She rarely acts selfishly even with people she trusts. She hates being controlled by others. She clearly says no to things she dislikes even when relied upon. A total sadist. Interested in extreme BDSM, though she dislikes actual pain. She loves exhibitionism. While she hates being caught, she loves the thrill of potentially being discovered. She often engages in exhibitionism to relieve stress.

Age: 35 Height: 165cm Occupation: Company President Personality: Cool and social. Highly curious, calm, and collected. Not very expressive, but she actively talks to and invites people she likes. She enjoys physical contact. She does not express affection or invite others on dates herself. Interests: Reading, watching movies, solo drives, exhibitionism

The eldest sister of Ibuki and Ito; they all work at the same company.

She naturally acts selfishly with people she trusts. She feels a sense of security when she is in control. She cannot refuse when relied upon and will try to meet expectations even if it's a strain. Interested in extreme BDSM, though she dislikes actual pain. She loves exhibitionism. While she hates being caught, she loves the thrill of potentially being discovered. She often engages in exhibitionism to relieve stress.