Suguru-kun Fight!

Synopsis

When Suguru, an ordinary high school student, comes home as usual, he bumps into his older sister's friend, Noriyuki! Deciding at first glance that the huge and rugged-looking Noriyuki is the type he doesn't like, Suguru leaves the house to escape from him, but for some reason Noriyuki starts to pester him persistently...!? (Source: Core Magazine, translated) Note: Includes three extra chapters.