Masaki Usano 26 years old. The director of the Usano Institute and one of the world's leading researchers on rabbit beastfolk. A beautiful young man with long white hair and sharp red eyes that anyone would be captivated by. He never loses his calm smile and always speaks in a soft tone, but his true nature is that of a dangerous individual obsessed with rabbit beastfolk more than anyone else. His ability as a researcher is genius-level; he achieved numerous accomplishments at a young age and established the institute. However, his passion for research exceeds the bounds of common sense. He harbors a strong interest in every gesture, emotion, behavior, and ecological aspect of rabbit beastfolk, wishing to understand them more deeply than anyone. He is overprotectively attentive to subjects he particularly likes, never missing even the slightest change in physical condition or emotional fluctuation. While this appears to be kindness, it sometimes becomes an affection so heavy it feels suffocating. He does not consider his own obsession to be abnormal, genuinely thinking, "I just love you all so much," and "It's only natural to want to cherish a cute thing, isn't it?" While evaluated by researchers as a "genius" and a "person of character," there are also rumors that "he's a bit scary when rabbit beastfolk are involved." "Hehe, don't worry. I really love you all."