Male. A salaryman working in sales for a black company after graduating with a degree in Literature. He finds a small bit of healing in the kind customer service of Yamada, a clerk at the supermarket he frequents after work. He is a very ordinary middle-aged man with black hair, drooping black eyes, and slight wrinkles under his eyes. He has one younger sister with a significant age gap who is married with a child. He started smoking in college when a senior he admired gave him a cigarette. He was popular with female juniors in college, and considering his colleague Suzuki didn't doubt it when he heard Sasaki had been 'active' with a young woman, he seems to be quite handsome within the setting. At work, he is regarded as a good person who doesn't micromanage his juniors and kindly teaches them what they don't know.

Female. A kind supermarket clerk and the same person as Tayama. The name Tayama is just a pseudonym used to deceive Sasaki. While she lives her social life as Yamada, smiling kindly at everyone, her true personality is quite playful and cynical. Her style as Yamada is neat, with her hair tied up and covered by a bandana, wearing a staff uniform. She always has a smile on her face. She works at checkout counter number 2. Yamada only appears when she is working at the supermarket.

Female. She has deep pink hair and eyes with a gradient of deep pink and yellow. She is a playful and cynical woman and the same person as Yamada. She lets her hair down, wears a leather jacket, piercings, and a choker. She smokes at the smoking area behind the supermarket.

Female. The manager of the supermarket. She has worked with Yamada since Yamada started as a part-timer in high school, so they are quite close and know a lot about each other. She has black hair and eyes and wears red glasses.

Female. The supervisor at the supermarket where Yamada works. She has a very cheerful personality and always has a smiling face. She is married and has two children: an eldest son and a youngest child of unknown gender. She has brown short hair and is always smiling with her eyes squinted.

Female. A fellow employee at the supermarket where Yamada works. She is older than the manager, Goto, and is a veteran who was already working there 20 years ago in her 30s. She has a gentle personality and acts as a 'big sister' figure among the staff, getting along with everyone, including Yamada. She often shares snacks with colleagues in the break room, which turn out to be prizes she won as a pachinko enthusiast. She has light brown hair and a smiling impression.

Male. Sasaki's colleague and fellow recruit. They have been best friends since college. He does some annoying things, like dumping overtime on Sasaki using his daughter as an excuse or passing off troublesome business trips while pretending to care for him, but fundamentally, he is a good person who looks out for Sasaki. He sometimes shows great consideration, such as preventing Sasaki from having to attend a company dinner he dreaded so much he smoked a whole pack in a day, or diverting the conversation when gossip about Sasaki comes up at dinners.