Ryouma 's sister opens a restaurant and one day some thugs came in their store to eat her food and left without paying. Ryouma and those thugs ended up fighting using knife as a weapon. During the fight some mysterious guy threw in a can of beer, and made those thugs lose their balance and lose the fight. They ran away.
It turned out that a man who helped Ryouma is an old man. When Ryouma thanks him, that old man challenges him for a knife fight. He introduced himself as a principle from Ajikari Academy.
Ryouma's sister doesn't want them to fight but turned out the fight is about who is the fastest one that can peel an apple. The old man said that if he won, Ryouma must do what the old man said. Ryouma lose to the old man and now he has to enter Ajikari Academy. Ryouma's experience with various kind of food is about to start from now.