Uzaki Byaku and Takaba Tadanao are childhood friends. They used to be good friends when they were kids, but now they've become bitter enemies. One day, when they are fighting each other as usual, Byaku tries to take control of the situation by using Tadanao's weakness, but he finds himself being pushed down, having his pants taken off, and even having his butt teased! And he can't believe it feels so good that it makes him let out a voice! A story of loyal and lewd first love between a high schooler who looks honest and diligent at first glance, and a sexually inexperienced mischievous high schooler! (Source: Kasakura Shuppan, translated) Note: Includes one extra chapter.