Hidden King

Rokujo Minharu is a middle school student who is indifferent to the people and things around him, but his body hides the most powerful secret technique in the ninja world (that is, the hidden world) "Senra Wanxiang". In order to seize this unparalleled power, the "Gray Wolves" from Iga ninjas all mobilized, vowing to bring Renqing back to Iga. On the other hand, Renqing's English teacher Yunping and Renqing's classmate Hongyi are both ninjas from Ten Thousand Heavens, and their mission is to protect Renqing's safety. A fierce battle involves ninjas from all sides. If Renqing wants to return to her solitary life, the only way is to become the Hidden King! So he was forced to enter the hidden world and face unknown challenges!