Reincarnated into the world of ninjas as the older brother of Tenten. "Tenten, what's so fun about ninja tools? Brother will teach you how to play with hidden weapons." "Tenten, watch closely, this kunai I throw will definitely kill a Jonin eight hundred miles away." "Tenten, today brother will teach you how to pierce Susanoo with senbon!" This is a story where hidden weapons can do anything.