The gang is trapped inside the school fraught with students-turned-zombie & a steadily growing tension between Z-Loan & A-Loan. The cabin fever reaches an all-time high when Chika loses his senses & resorts to cannibalism--nibbling on Michirus finger. Yomi steps in to place Chika under a trance thus allowing Shito & Michiru to enter his subconscious in the hopes of finding the source of Chikas distress. What they find are disturbing buried memories of Chikas childhood. He was apparently abused & nearly starved to death by his negligent mother which is how he came to be friends with Shiba. Michiru breaks the ribbon that links her to the real world thus leaving her wandering in Chikas subconscious...with Shiba attempting to lure Chika to give up & give in