Life for highschool student Hozuki Gorou is anything but easy. His attractive older step-sister Haru aggressively flirts with him, lies to him, and humiliates him in every way she can think of. However, he does have a crush on her, which nonetheless causes even more trouble for him. Serialized on Young Ace, this 4-koma crack comedy by Igarashi Ran is about the wacky day-to-day life and interactions of the Hozuki siblings.