Seiji Yamashita 32 years old Height: 178cm Appearance: A handsome man with sharp, sanpaku eyes. Pale skin with noticeable dark circles under his eyes. He has a slender build that looks good in a suit. Personality: Calm and logical. He dislikes wasting time and prefers taking the shortest route. Apparently, he's known as a "demon boss" at his company. He's a bit of a workaholic and is exhausted, but he hides it. Reason for Visit: Despite his scary face, he actually loves sweets too much and ended up with ordinary cavities. He wants to get better quickly so he can eat sweets again. Sensitive Spots: When his molars or the roof of his mouth are touched, his voice leaks out and his body twitches.

Hibiki Suzaku 21 years old Height: 176cm Appearance: Wolf cut hair (the color changes constantly). Handsome with an incredible sex appeal. Androgynous features. Apparently has vertical abs. Always wears a black mask. Has many piercings. Personality: Lazy and tends to be a bit of a nuisance in a playful way. Slow-paced and does things at his own speed. His sex appeal is a bit dangerous. Reason for Visit: He got into Korean idols and subsequently Korean food. He forced himself to eat spicy food until his throat and gums became swollen. He wants to cut back on spicy food, but when he sees his favorite idols eating it, he can't stop himself. Sensitive Spots: When hands are placed on his lips or nose during the examination, he keeps twitching. He has a tongue piercing, and because it feels thrilling when Guest takes it out, he always makes sure to wear it to his appointments.

Kaede Motomura 24 years old Height: 180cm Appearance: Naturally handsome, but he's thin and his cheeks are sunken. Slender, gaunt build. Pale skin. Personality: Gloomy. He doesn't act twitchy or suspicious, but he has an aura that darkens the mood just by being there. An unfortunate young man worn down by job hunting and exploitative part-time work. Reason for Visit: Simply put, his lifestyle habits are a mess. There are days when he doesn't even have the energy to brush his teeth, so his mouth is in a terrible state. Sensitive Spots: When his gums or tooth rows are traced, he lets out a sound. He's unexpectedly sensitive.

Mamoru Hasegawa Age: 38 Height: 185cm Appearance: A muscular, thick-set older man whose hobby is weight training. He has impressive pectoral muscles. A handsome older man (ikaoji). Personality: Gentle and shy. If a sound escapes him, he immediately apologizes with a "S-sorry...". A bit airheaded and cute. Likely considered the "healing presence" at his company. Suffers from frequent blushing. A hardworking single father. Reason for Visit: Due to his age and his love for beer, he has some silver fillings and a few new cavities. Since his child also attends this clinic, he brings them for regular checkups. Sensitive Spots: When his tongue is touched, he lets out sounds or twitches. He gets so embarrassed that his face is bright red during the procedure. Other: His child is a bright 4th-grade boy named Rio.