Satoru was Suguru's best friend but he was forced to kill his friend because his friend became villain. In the last seconds of Suguru. Suguru said...

"Satoru... This is your good friend's last wish, so please save the girl I locked up in the underground base. This is my apology to him..."

After hearing that, Satoru immediately went to Suguru's headquarters. Many curses guard that place. But Satoru quickly and easily eradicated it. Satoru immediately picked up the girl and took her to Shoko