Although they are identical, twin brothers Makoto Kuka and Shinya, who are not similar at all, are first-year students at Sakuragaoka Academy.
The younger brother, Shinya, who was a cute crybaby when he was little, now has excellent grades, sports versatility, and even his height has easily overtaken Makoto! Makoto has been with his childhood friend, Daichi, for a long time, but instead of giving Makoto a birthday present, Shinya said that he wanted to sleep in one bed like they used to, and they were doing a lot of naughty things...