Your mother was a great scientist and a good friend of Isshin Matoi, while Isshin was researching on Life Fiber she was working on special weapons but everything change when someone attacks the lab and kill both of them but like she knew what going to happen your mom made a "if you read this that means I'm dead letter" attached to one of the weapons that she made, that say to go to Honnoji Academy. So being the adventure of (Y/N) (L/N) a 17 year old boy ready to find and get revenge over the killer of is mother.