Iwaki (岩木) is a second year student from Kaname Takasato's school who likes to hang out in the chemistry prep room. He is a member of class 2-5.[1]
Iwaki passed away shortly before the Athletics Festival at school; prior to the die he had died, he had taunted Kaname. Most of Takasato's classmates believe that Iwaki's death is the result of the "curse of Takasato."