Kaoru Yamazaki (山崎薫)

"Tatsuhiro's former kouhai (Junior) in high school, who is an otaku. Tatsuhiro once stood up for him when he was still in middle school being beat up by some bullies, since then, he respected him greatly and decided to join the literature club with him when he went into high school. He is currently Tatsuhiro's neighbor and a college student aspiring to be a game creator."

(Source: Wikipedia)