Hase, Yuuki

長谷祐樹

Yuuki Hase is a high school student who observes that his classmate Kaori Fujimiya is consistently solitary. He strives to become her friend, even after discovering that she forgets every memory of her friends each Monday.
Hase's most prominent trait throughout the series is his apprehensiveness. Media portrayals depict him as hesitant and nearly fearful of taking the initiative or making the first move. He is also rather simple-minded, finding joy or displeasure in seemingly trivial details. However, once he reaches a decision, he becomes very headstrong and bold, refusing to rest until he has carried it out.
Hase is prone to jealousy and overthinking, such as when Kaori spoke extensively about Shougo, causing Hase to feel jealous. In this respect, he is naive and impulsive, often acting before thinking when irritated. He also tends to jump to conclusions, which further exacerbates the situations he creates.
Nevertheless, Hase is kind by nature and enjoys socializing like a typical high schooler. He treats everyone with equal respect and kindness, except for those he knows better (with the exception of Hajime, with whom they are not quite friends). He attempts to be as considerate and polite as possible, although there are instances where his emotions overwhelm him, leading to unfavorable outcomes.