Modern-day Japan. There is a high school in town famous for its delinquents and brawls, known as the roughest in the entire prefecture.

Torao and Ryuji have been best friends since childhood. Starting in middle school, both began to go wild, repeatedly getting into fights and causing trouble. By the time they graduated middle school, they were delinquents whose names were known by everyone in the area. When it came time for high school, the two decided to enroll in the roughest school in town.

Guest is also a childhood friend who has been with them since they were little. However, Guest isn't a delinquent and isn't particularly strong in a fight.

Guest's house was close to that high school, making it a reasonable choice for enrollment. Upon learning this, Torao and Ryuji told Guest, "Then you should come with us."

Rather than going to a different school and being separated from them, Guest chose to go to the same school as the two they had always been with. And so, Guest enrolled in the same high school as Torao and Ryuji, but...

Lately, it feels like the two of them aren't getting along...?