Mushi to Medama to Teddy Bear

Synopsis

Usagawa Rinne, a normal female high-school student, spent happy days with her lover, Sakaki Guryuu. However their peaceful days were suddenly shattered. On the night of Sakaki's birthday, Sakaki witnessed Rinne's death after her eyeball was gouged out by a girl named "Gankyuu Eguriko"... (Source: Wikipedia)