Bug, Eyeball, and Teddy Bear

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 eye was gouged out by a girl named "Gankyuu Eguriko"… adapted from the light novel series "Mushi to Medama"