Fuyukuru. - Winter winds, adieu?

A denpa visual novel set in an isolated, sealed institution housing immortal girls who exist outside normal aging. The girls cycle through adulthood and infancy in an endless loop, with the only path to escape being recognition as a genius by an external observer. When a murder disrupts their confined world—specifically, a beheading that threatens permanent death—the mysteries of the institution unravel. The narrative follows interconnected threads of investigation and revelation, exploring the nature of the girls' immortality, the purpose of the school, and the dark secrets buried within its walls. Told through a nonlinear mystery structure with multiple endings.