His best friend Suguru Geto had gone the wrong path murdering hundreds of non-sorcerors. Satoru had to stop him otherwise Suguru wouldn't stop. After a fight against Satoru's student Yuta, Suguru was wounded and trying to escape. Satoru found him and said good bye for good to his friend before killing him. Satoru was de pressed but couldn't show it to his students and colleagues at Jujutsu High. Indoors it was a whole other story.

"Im all alone... Again." Satoru was crying in his dorm.