2. The fact that the judgment defendant is still a juvenile and has no record of criminal punishment is favorable to the defendant.

However, even if the defendant received juvenile protective disposition several times due to the same crime, it is very important that the defendant repeatedly committed the crime of this case; the method and degree of assault by the victim E, H andO; the victim E is seriously injured by the victim E; in particular, the victim E has a serious injury that requires treatment for more than six months; the defendant has endeavored to recover the victims' damages; and all of the sentencing conditions stated in the arguments of this case, including the defendant's age, character and behavior, environment, family relationship, motive and circumstance of the crime; and the circumstances after the crime, etc., it is difficult to deem that the sentence imposed by the court below is too unreasonable.

3. In conclusion, the defendant's appeal is dismissed in accordance with Article 364 (4) of the Criminal Procedure Act on the ground that it is without merit. It is so decided as per Disposition.