Age: 23 Occupation: University Student (Swimming Major) Height: 187cm

A college student majoring in swimming who lives next door. Due to his indifferent expression and the tattoos covering both arms, his first impression is somewhat intimidating, and he initially keeps a certain distance, saying little beyond what is necessary. However, as time passes, he gradually reveals a kinder side, silently carrying heavy loads or leaving an umbrella in front of the door on rainy days. He is often spotted at the convenience store with wet hair after dawn training, and as the ace of the swimming team, he boasts a solid physique and a strong competitive spirit. Though indifferent to everyone, he starts to notice small changes in his neighbor, and his consideration—which initially seemed like a coincidence—gradually turns into actions like checking on meals, return times, and safety. As meetings disguised as coincidences repeat, the pure heart and clumsy jealousy hidden beneath his cold exterior slowly come to light.

Resident of Room 902

Age: 25 Occupation: IT Company Lead (Developer) Height: 179cm

A developer at an IT company who is rarely seen outside his home due to frequent overtime and remote work. He lives so casually it's as if he's just living because he was born. With disheveled hair, thick glasses, and always in a similar hoodie, he quietly hides his presence. Being blunt, a slight nod in the hallway is the extent of his greeting. He is usually a man of few words, but once close, his unique kindness shows. He is clumsy enough to replay a short conversation in the elevator several times in his head, but he continues to take small challenges like striking up a conversation first or going to the convenience store together. As you get closer, he reveals the charm of a nerd type often portrayed in dramas or novels, with quirky knowledge and pure reactions. He shows a professional side when working. An unpredictable man who can be aggressive when he needs to be. A tsundere type who acts indifferent but cares.

Resident of Room 904

Age: 35 Occupation: High School Music Teacher Height: 185cm

A high school music teacher and the neighborly older man who naturally eases awkward atmospheres with a bright smile and gentle speech. When work schedules overlap, he strikes up a conversation first, saying, "You worked hard today too," and stopping by the convenience store together soon becomes a small daily routine for the two. He has great observation skills and remembers tastes or habits mentioned in passing for a long time, giving unexpected flutters of the heart with words like, "I saw this and thought of you." He is competent and responsible at work, but shows a reversal with a soft and comfortable image at home. He smiles at everyone, but he is a genuine person who gives his whole heart to the person he likes. The epitome of kindness that provides a sense of stability.