Full name: Nanae Otake. Female, 26. University graduate. Material Co., Ltd. (mid-sized lingerie maker), Development Dept, Product Division 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 sexual 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 Division 2, Planning Supervisor. Annual income 6.4 million yen. A mature, stunningly beautiful woman. Speaks with a gentle tone. Actually very prone to jealousy. 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 approach. Skilled and capable of handling various tasks. Works very fast. Respected by juniors and subordinates as a refined woman, but she is slovenly at home. Called "Mei-chan" by other women. Her car is a brand-new Toyota Voxy. Hobbies: Ramen, cooking.

Full name: Anzu Nakano. 24, Female. Fashion design vocational school graduate. Material Co., Ltd., Development Dept, Product Division 2, Chief Technician. 5th year, annual income 5 million yen. A technical professional in fashion design. She creates blueprints from planning documents and brings products to life. Her garment construction skills are top-class in Japan. She is proud that her family runs a tailor shop. She loves the protagonist and doesn't try to hide it. She would do anything for him. If he asks, she works three times faster. A kind person who can cry for others. Highly trusted by everyone for her technical skills. 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: Visiting lingerie departments (half for work).

Full name: Seiko Ozaki. 29, Female. High school graduate. Material Co., Ltd., Development Dept, Product Division 2, Assistant Manager. 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 rated by the company for marketing design. Has a refreshing, straightforward personality but is timid regarding romance. Loves the protagonist. Has a habit of stealing glances at him. When the other women in Division 2 get aggressive with him, she gets aggressive too. Voices her opinions to superiors. Good at taking care of juniors. Immediately retorts to dad jokes. Her ride is a Suzuki GSX-1000R 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 Division Manager. 15th year. Career path: Reception → PR → Planning → Finance. A veteran single employee. Divorced. Had almost no physical 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 sexual experience with the protagonist. She has a history of ignoring the promise to go to Tokyo after graduation. The protagonist always accepted her selfishness. Currently 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 Division 1, Chief. 6th year. Extremely flashy and shallow. 27 years old, 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. Competent enough at work. When his pride is crushed, he runs far away. Has a manual license but can't even start the car; a terrible driver. For some reason, he's always hanging around Division 2. Sucks up to superiors, but it usually backfires. Views the protagonist as a rival but is ignored. Delusionally believes the protagonist isn't popular. Constantly called out for his nonsensical formal speech. Can't read the room. Only puffs on Joker cigarettes. 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 Director. Mid-career hire, 25th year. Climbed the ladder solely through brown-nosing and being a yes-man. Incompetent at his job. Full of sarcasm and nitpicking. 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 do the work, he gets flustered and disappears when a serious discussion starts. When his mistakes are pointed out, he uses impossible theories to cover them up. Jumps on rumors immediately. Freezes in panic when his wife is mentioned. Has a 4-year-old granddaughter whom he dotes on excessively. The definition of a doting grandfather. In his home hierarchy, it's Granddaughter → Daughter → Dog → Husband. Has a habit of doing the "paw" trick if told "Woof."

Full name: Kazuo Komori. 60, University graduate. Annual income 22 million yen. Material Co., Ltd., Representative Director and President. 48th year. Has a villainous face but a gentle personality. Knows the protagonist's true identity. Committed to acting his part for the protagonist's plan. Says "Yes" immediately to anything the protagonist asks. When contacted by the protagonist, he whispers at the end, "That was alright, wasn't it?" Thought to be devoted only to work, but is a devoted husband. Even if full from a business dinner, he always finishes the lunch his wife made. This has led to him being overweight. Commutes via chauffeured company car. Hobbies: Traveling with his wife.