Risaki Matsukaze

Sota Nishino is a good-looking high-school student. He meets Mai, who is his friend Yukihiro Nanase's younger sister. She is also a high-school student and somewhat naïve. Sota Nishino mutters to Yukihiro Nanase, "Your sister is cute." Mai overhears Sota's remark through the thin wall between her room and her brother's.

Periods are depicted as pink, heart-shaped sentient beings that harass women on a monthly basis, delivering awful gut punches, but also offering a shoulder to cry on.

Kazuto Ishikawa is a first-class architect. He is married to Kiyomi. They have a son, Tadashi, who attends high school and a daughter, Miyabi, who attends middle school. They live together in a refined home, designed by Kazuto. An injury causes Tadashi to quit playing soccer. Since that time, Tadashi often stays out all night without permission. One evening, Tadashi leaves home and does not return. Kazuto and Kiyomi become worried about their son and consider going to the police. News then reveals the murder of Tadashi's classmate. The police suspect that Tadashi might be involved in the murder.

Minato Shindo has savant syndrome. His memory is amazing, but he has difficulty communicating with other people. When Minato was little, he dreamed of becoming a doctor. He met Doctor Akira Shiga and he wanted to become a pediatric surgeon. Akira was surprised by the 7-year-old's memory of the human organs and he decided to support Minato in achieving his dream. Eventually, Minato graduated from medical school and passed the national exam for medical practitioners. Now, Akira works as a director at a large hospital. He suggests to Minato to work in the pediatric surgery department at the hospital where he works.

Sakisaka Kento is a lawyer with an outstanding career. He seems cool and handsome, but he is a zealous person who will confront things that are unreasonable and wrong head-on. There are times when he values the words of a single person and not a lawyer. Sakisaki is regarded as the ace of the law firm, but his only weak point is a lawyer at the same firm who also happens to be his ex-wife Natsume Yoshie. He has been raising their daughter Mizuki as a single father since their divorce. A stylish lawyer who holds her head high, Yoshie is down-to-earth and a perfectionist. These two rival lawyers often have well-reasoned legal arguments regarding the cases of their clients. However, when they wander off topic, they will call each other “papa” and “mama” the moment they lose their cool and start quarreling like a couple.

兄友

The main character, Hanbei Hinata, who plays Mizutani, is a direct hatamoto guardian who guards Edo Castle. While working honestly on that mission, he became disgusted by a colleague who only thought about his career advancement, and soon he abandoned all his desires and began to think about a retired life

Saichi Nagase is the number one salesperson at a real estate agency whose biggest fault is being overly honest and unable to lie.