In this chapter, the protagonist explains that he is in the "battlefield alley" next to his school. He has just received a challenge letter from a new gang at another school. The gang's leader is stupid and does not study, so he gave them the name "Red Dragon Clan" . He explains that there are three cases that he may encounter later on. Case 1 is that each muscle type defeats the other. Case 2 is that the other muscle type blocks the other one. Case 3 is that they lie and say that they defeated the top student at the school. Then they follow the routine of how to defeat each other.