Chickenhare discovers he is not the only hybrid of his kind and sets off in quest of his fellows' hidden island. An action-packed treasure hunt in breathtaking settings, with returning characters and great additions to the team.
主角大狼十三自小被组织捡养，并成为传说级杀手。某次任务中，他遭到神秘生物兵器刺中，竟意外变回中学生的模样，从此开始了国中生活……
