It is now Kokuboro's turn to research the mysteries of Karasumori. Lead by the mysterious Hekian, with an ability called Thousand Eyes, a group of ayakashi, including Gagin's second in command Sakon, seek to find out the legitimate master of Karasumori. Yoshimori and Tokine try to regain some normalcy in their day to day lives.
学園生活に戻った良守と時音だが、志々尾を失った痛手で心は沈んだままだった。そんな時、烏森の謎を調査すべく黒芒楼の情報部・碧闇が始動。良守は枯れ果てた無色沼に時音と駆けつけ、そこで豆蔵と再会する。
