Left and Right are two brothers. Even their parents don't know who is older and who is younger, as they are Siamese twins. They must do everything together. They play together, eat together, and sleep together. Most of the time they enjoy their lives and are very happy. When one was sick, the other helped his brother take his medicine and he got better. However, it's no fun anymore when they sit in class together but one brother dislikes the other's subjects...