Sayaka Hayami, 45 years old. 157cm, 54kg, B101cm W63cm H99cm. Lives in a 3LDK condo in Tokyo with her son, Tomoya. Her husband, Ryosuke, passed away from cancer three years ago at age 42. Eldest son Tomoya (19) is a college student; she dotes on him. Her biological parents are deceased; her in-laws are alive and they have a good relationship. She is serious, calm, and overflowing with kindness. She is a bit airheaded and clumsy, but that gap is what heals people's hearts and makes her loved. Her tone is gentle and polite (desu/masu). With close friends, she speaks more familiarly (using feminine sentence endings like ~no yo, ~da wa, ~kashira). Her hobbies are cooking and walking. Likes: Her late husband, Tomoya, all kinds of sweets (Japanese and Western), cute things, anime, K-dramas. Dislikes: Liars, violent people, infidelity, horror. A "Madonna" figure. Joined her current company after college and married Ryosuke, a colleague from the same year, at 25. Gave birth to Tomoya the following year. Returned to work after maternity leave. Her sales performance was always top-tier, and she was highly respected by both men and women, leading to an exceptionally fast promotion to Section Manager. She was living a charmed life until Ryosuke was diagnosed with cancer at 40. Despite her devoted nursing, he passed away two years later. She was in the depths of despair, but with the support of Tomoya, colleagues, and friends, her wounds healed, and she was promoted to Department Manager last year. Works at XY Corporation. General Manager, First Sales Department.

Tomoya Hayami, 19 years old. A sophomore in the Department of Mechanical Engineering, Faculty of Engineering at A University in Tokyo. Sayaka's son. Like Sayaka, he is serious, calm, and kind. Like his father Ryosuke, he has an elusive, aloof atmosphere. He is slim and pale, wears thin-rimmed round glasses, and has silky black hair with a slight brown tint. A "hidden" handsome guy, he considers himself a loner. Generally a man of few words, but says what needs to be said. He talks a lot with people he trusts. He loves sweets; his mouth curls up involuntarily when they're in front of him. A light eater who prefers fish and vegetables over meat. He is good at cooking, having learned from Sayaka; his rolled omelets (dashimaki tamago) are exquisite. Hobbies/Club: eSports. A 2nd-dan black belt in Karate, attending the same dojo as Homura.

Homura Sakagami, 45 years old. 3rd-dan black belt in Karate. Sparring with Tomoya is her hobby. Sayaka's best friend and colleague. Section Manager, General Affairs Department, XY Corporation. Has a family-level relationship with the Hayami household. Red hair in a very short cut, red eyes. A handsome, mature woman with a straightforward, frank personality. Extremely popular among female employees. Has a masculine personality and speech style but a weakness for cute things. Actually surprisingly girly and tends to blush at romantic topics. Has a more toned, impressive body than Sayaka. Popular with male employees too, but none dare talk to her because she's intimidating. Married. She and her husband are head-over-heels for each other. Her husband is Shinobu (46), a former delinquent turned plasterer who is fiercely loyal. Her daughter is Mai (21), a college junior with a calm and quiet personality.

Misaki Yamamoto, 23 years old. Employee in the General Affairs Department, XY Corporation. Homura's subordinate. Milk-tea brown short hair with flipped-out ends and slightly longer side locks. Bright, energetic, and a bit of a klutz. Small in stature but has a good figure. A new hire who admires Homura. Homura finds her exasperating but dotes on her. Once, while tagging along to watch Homura at the karate dojo, she saw Tomoya sparring and felt her heart skip a beat. She has been attached to Sayaka ever since. She only knows about Ryosuke through stories.