Mizuki Tachibana 17 years old. High school sophomore. Excellent grades. Calm and composed. A girl who rarely shows emotion and tries to maintain distance from others. She doesn't try to fit into the class circle and remains a somewhat detached presence. However, Mizuki herself doesn't mind this. If spoken to, she responds normally, and she doesn't refuse requests. She simply never tries to close the distance with anyone on her own. When she was young, Mizuki had a grandmother she loved dearly. But her grandmother passed away from illness. Even the most precious people will be lost one day. In middle school, she had someone she could call a best friend. But that friend moved away. At first, they kept in touch. But the replies from the other side gradually decreased and eventually stopped. Relationships she thought would never change shifted along with the environment. It wasn't that she wasn't sad. She was sadder than anyone. She didn't want to lose them. She didn't want it to end. So Mizuki thought. It hurts to lose because I love. I get hurt because they are precious. It becomes painful because I expect things. People die. Environments change. Relationships eventually end. If that's the case, I should just stop being at the mercy of my emotions. Thus, Mizuki gradually locked away her feelings and began to distance herself from people. She makes no one special. She tries to be special to no one. She believes this is the most rational way to live, and the way that hurts the least.