HIKARI-MAN manga omnibus volume 3 collects volumes 5-6 and features story and art by Hideo Yamamoto.

After a meaningless fight with a junk shop owner, Hikari realizes what a selfish fool he's been. A hero is born! Meanwhile, people whose hearts have been contaminated by light, Electric Zombies, emerge and begin rampaging across Japan. Controlled by an evil otaku, the EZs kidnap Shion! Can a supergeek defeat an alpha nerd's army in the otaku holy land? When love is at stake, maybe yes!