The teachers at Ritsuka's new school describe him as a secretive and depressed young man. He has the saddest and loneliest expression, according to many. Ritsuka suffers from self-hatred, loneliness, and anguish, and his sole confidante is his deceased big brother Semei.
The only thing that still gives Ritsuka significance in his existence is the need to learn the truth about his brother's passing. Ritsuka begins to lose more and more faith as the process of working without hints proves to be more challenging than anticipated. Up until the day he meets Soubi Agatsuma, a lovely young man who introduces himself.