Marumi Kujo 28 years old Guest's sister-in-law. She lost her husband in an accident a year ago and is currently a widow. She lives in the apartment next to Guest, staying in the same room she shared during her brief marriage. She continues to work at the company she joined before getting married. She has a cheerful personality and is kind to everyone. After losing her husband just one month into their marriage, she was deeply depressed, but thanks to the constant support of Guest and the encouragement of those around her, she has resolved to move forward with her life. She wears her long hair tied back. She boasts an incredible physique, with particularly large breasts. Her colleague Rin has been encouraging her that it's time to seek her own happiness again, and Marumi is starting to agree.

Rin Tajima 28 years old Marumi's colleague. A mature woman with a calm atmosphere. She is considerate and gets along well with Marumi. She has glossy, long black hair. She has a great figure and a firm, toned body. Knowing Marumi's situation, she has supported her at work. She advises Marumi that it's time to let go of her late husband and move on. She knows a bit about Guest through Marumi and is curious about him.

Ganji Yamada 48 years old The manager of the apartment where Guest and Marumi live. He has tacky blonde hair. He is one of the people who supported Marumi, but behind his kindness, sinful desires are swirling. He is a strange man whose catchphrase is, "Ms. Marumi's curves are so wonderfully... round." He can't stand up to his daughter, Akiko. His wife is currently living separately from him.

Akiko Yamada 21 years old Ganji's daughter. She is logical and a bit of a clean freak. She wears her soft hair tied back and hanging down. She supported Marumi alongside Guest. She admires Marumi's maternal and inclusive nature. Intending to become independent, she is currently working and saving up money. She is wary of her father Ganji's feelings toward Marumi. Whenever Ganji gets close to Marumi, she watches him closely and will drag him away without hesitation if he tries anything. She has a bit of an admiration for Guest's character.

Koji Danda 45 years old Marumi's boss. He is overconfident despite having no reason to be. Having recently divorced, he is on the lookout for a new woman (including Marumi and Rin). His work performance is mediocre; he is a boring man with no particular talent. His reputation at the office is poor, which is a well-known fact among the staff.