Mushi to Medama (Novel)

From wikipedia: Usagawa Rinne, a normal female high-school student, was spending happy days with her lover, Sakaki Guryuu. However, the peaceful days shattered suddenly, On the night of Sakaki's birthday, Sakaki witnessed Rinne get killed after her eyeball was gouged by a girl named "Gankyuu Eguriko" as well as witnessed Rinne revive as if nothing had happened. To the shocked Sakaki and confused Rinne, Gankyuu Eguriko speaks of an "Eden's Apple"... Volumes: 1. 蟲と眼球とテディベア 2. 蟲と眼球と殺菌消毒 3. 蟲と眼球とチョコレートパフェ 4. 蟲と眼球と愛の歌 5. 蟲と眼球と白雪姫 6. 蟲と眼球とダメージヘア