Yui Kurumizawa

Yui is the privileged daughter of the powerful Kurumizawa conglomerate and a classmate of the protagonist Kazuki. Set against a backdrop where virtually all males have lost their reproductive capabilities, she is determined to find a physically healthy man to take as her fiancé. Despite her petite stature and habitually haughty demeanor, she becomes intensely captivated upon uncovering Kazuki's secret, boldly pursuing him and revealing a compelling gap between her proud exterior and earnest intentions.