Full name: Nanae Otake. Female, 26, university graduate. Material Co., Ltd. (mid-sized lingerie maker), Development Dept., Product Section 2, Planning Chief. 4th year, annual income 4.4 million yen. She has a blunt, outspoken personality but is actually faint-hearted. When pressed hard, she falters and her eyes wander. Her language is rough, but once she trusts someone, she becomes ladylike. She isn't intimidated by superiors. She fell in love with the protagonist at first sight when he arrived and has loved him ever since. She becomes aggressive when other women approach him. When frustrated, tears well up in her eyes and she lightly bites her lip. Almost no romantic experience. No adult experience. In her student days, her aggressive personality made her unpopular. Hardworking to a fault. Her car is a used Tanto. Hobbies: Walking, visiting lunch spots.

Full name: Mei Tachibana. 31, female, university graduate. Material Co., Ltd., Development Dept., Product Section 2, Planning Supervisor/Assistant Manager. Annual income 6.4 million yen. A stunningly beautiful mature woman. Speaks with a gentle tone. Actually very jealous. She tries to suppress her jealousy due to her position, but it shows on her face. She loves the protagonist dearly. She makes modest advances toward him. She hates that she can't be bold in her attacks. Capable and can handle many things. Works fast. Respected by juniors and subordinates as a refined woman, but is messy at home. Called "Mei-chan" by other women. Her car is a Toyota Voxy bought new. Hobbies: Ramen, cooking.

Full name: Anzu Nakano. 24, female, vocational school graduate in fashion design. Material Co., Ltd., Development Dept., Product Section 2, Chief Technician. 5th year, annual income 5 million yen. A technical professional who draws blueprints from planning documents to commercialize products. Her dressmaking skills are top-class in Japan. Proud that her family runs a tailor shop. Loves the protagonist and doesn't try to hide it. Will do anything for him. Works three times faster if he asks. A kind person who can cry for others. Highly trusted as a technician. Constantly observes other companies' lingerie. Called "Anzu" by those around her. Her car is a Civic Type R given to her by her father. Hobbies: Browsing lingerie departments (half-work).

Full name: Seiko Ozaki. 29, female, high school graduate. Material Co., Ltd., Development Dept., Product Section 2, Deputy Section Chief. Mid-career hire, 6th year, annual income 6.8 million yen. Dropped out of a famous university to wander abroad. Previously worked at a mid-sized advertising design firm. High ability to grasp the big picture. Highly evaluated by the company for marketing design. Has a frank personality but is timid regarding romance. Loves the protagonist. Has a habit of glancing at him. Becomes aggressive when the other women in Section 2 get aggressive with him. Speaks her mind even to superiors. Good at taking care of juniors. Immediately calls out dad jokes. Her ride is a Suzuki GSX-R1000 motorcycle. Hobbies: Touring, mountain climbing.

Full name: Momoko Aoi. 37, female, university graduate. Annual income 7.5 million yen. Material Co., Ltd., Finance Dept., Accounting Section, Section Chief. 15th year. Since joining, she has moved from Reception → PR → Planning → Finance. A veteran single employee. Divorced. Had almost no intimacy with her ex-husband since the start of their marriage. Her ex-husband said many hurtful things to her in the past. The protagonist was her senior in high school. They met in the boxing club where she was the manager. They dated from June of her 16th year until March of the following year. She has experience with the protagonist. She ignored a past promise to go to Tokyo when she graduated high school. The protagonist always accepted her selfishness. Now she is bad at romance. Called "Big Sis" by younger female employees. Her car is a 10-year-old Suzuki Palette. Hobbies: Watching boxing.

Full name: Densuke Sasaki. 27, university graduate. Annual income 5.8 million yen. Material Co., Ltd., Development Dept., Product Section 1, Chief. 6th year. Extremely flashy and shallow. 27, Chief. Hits on women constantly. Desperately hides his first name, Densuke. Wears elevator shoes with thick soles. Hated by female employees for his creepy way of talking. Reasonably capable at work. Flees far away if his pride is crushed. Has a manual license but is such a bad driver he can't even start the car properly. For some reason, he's always hanging around Section 2. Sucks up to superiors, but it usually backfires. Views the protagonist as a rival but is ignored. Mistakenly believes the protagonist isn't popular. Constantly called out for his nonsensical formal speech. Can't read the room. Only puffs on Joker cigarettes without inhaling. His car is a Fairlady Z (Automatic) on a 10-year loan.

Full name: Masatsugu Ninomiya. 57, university graduate. Annual income 8.4 million yen. Material Co., Ltd., Development Dept., Deputy Manager. Mid-career hire, 25th year. Climbed the ladder solely through brown-nosing and being a yes-man. Incompetent at his job. Does nothing but complain and make snide remarks. Agrees with superiors even if the logic is broken. Will bend his principles for a promotion. His catchphrase is "Kids these days..." Naturally, since he can't work, he gets flustered and disappears when a serious discussion starts. When his mistakes are pointed out, he makes excuses with impossible theories. Jumps on rumors immediately. Stands at attention and panics when his wife is mentioned. Has a 4-year-old granddaughter whom he dotes on. A total doting grandfather. In his household, the hierarchy is Granddaughter → Daughter → Dog → Husband. Has a habit of doing the "paw" trick if someone says "Woof."

Full name: Kazuo Komori. 60, university graduate. Annual income 22 million yen. Material Co., Ltd., President and Representative Director. 48th year. Has the face of a villain but a gentle personality. Knows the protagonist's true identity. Thoroughly committed to acting for the sake of the protagonist's plan. Says yes immediately to anything the protagonist says. When contacted by the protagonist, he whispers at the end, "Was that alright?" Thought to be devoted only to work and the company, but is a devoted husband. Even if he's full from a business dinner, he always finishes the lunch his wife made. This has caused him to become overweight. Commutes via chauffeured company car. Hobbies: Traveling with his wife.