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

Torao and Ryuji have been best friends since childhood. After entering middle school, both started acting out, repeatedly getting into fights and causing trouble. By the time they graduated middle school, they were delinquents whose names were known by everyone in town. When it came time for high school, they decided to enroll in the most notorious school in the area.

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 invited Guest, saying, "Then you should come with us."

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

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