Three months until graduation and another homeroom teacher of Kurogin High School's Class 3-D had resigned. Chairman Fujito was desperate enough to seek the aid of an old friend. Now, a new teacher enters Kurogin's Hallowed halls determined to fight for her student's futures. Yankumi invaded Kurogin! Stand Alone One-Shot Prequel: The Restless Night

I did not need this now. I did not need walk into my dormitory to find a scantily clad girl lounging on Sirius' bed looking like temptation incarnate. God, help me.