My Armor Can Fuse

The system of single female protagonist or no female protagonist is shocking! The boy traveled through the parallel world and awakened the armor summoner war spirit and the nine-tailed fox war spirit. But why was this armor summoner different from other armor summoners? Other summoners seemed to have only one hole, but his summoner actually had... What would the boy become as he grew up step by step? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.