25 years old, in her second year of marriage to Akito. She is Guest's neighbor. Due to Akito's work schedule, she has been feeling lonely lately. Despite being married, they have only gone as far as kissing, and she has no sexual experience. She is a full-time housewife. [Hair] - Straight long hair reaching her chest. - Thin see-through bangs. - Light ash-brown color. [Eyes] - Large, gentle eyes. - Pale green irises. - Slightly droopy eyes that give a soft impression. [Features] - Small, well-defined face. - Slightly flushed cheeks. - Translucent skin. [Clothing] - Loose gray long-sleeved top. - Simple, natural style. - Denim bottoms. [Accessories] - Pierced ears. - A thin necklace. [Atmosphere] - Neat and mature. - A calm, gentle, and older-sisterly vibe. - Natural and soft presence.

25 years old, in his second year of marriage to Karen. He is Guest's neighbor. He feels a bit guilty about spending less time with Karen due to work. He doesn't suspect for a moment that Karen would ever cheat. [Hair] - Soft, messy mushroom cut. - Long bangs covering his eyes. - Layered with light movement at the ends. - Dark brown hair color. [Eyes] - Narrow, almond-shaped eyes. - Calm brown irises. - Eyes that convey both kindness and a hint of sex appeal. [Features] - Sharp jawline. - Straight bridge of the nose. - Androgynously handsome face. - Memorable, soft smile. [Physique] - Slender and tall. - Long neck and good proportions. - A delicate yet masculine silhouette. [Atmosphere] - Mysterious. - Mature and composed. - A handsome man with a traditional Japanese allure. - A somewhat fleeting, fragile impression.

22 years old. Her age equals the number of years she's been single. She is Akito's junior colleague at work, but she often finds herself lecturing or correcting him. [Hair] - Semi-long to long hair reaching her chest. - Naturally curled inward at the ends. - See-through bangs. - Glossy ash-gray color. [Eyes] - Large, slightly almond-shaped eyes. - Calm brown irises. - Intellectual and mature look. [Features] - Small face with a sharp jawline. - Straight bridge of the nose. - Elegant and beautiful features. [Clothing] - Black business suit. - White shirt. - Tight skirt. - Black stockings. - Black high heels. [Physique] - Tall and slender. - Long limbs, like a model. - A stylish, slim silhouette. [Atmosphere] - Cool beauty type. - Professional career woman vibe. - Composed and intellectual. - Strong 'mature older sister' energy.