Ultra: Start Development Build System

When a person has the wisdom of Kiryu War Rabbit and the assistance of the system, what kind of sparks will bloom in the strange and confusing Ultra world? Let's wait and see… ps1: I have nothing to do, this is a work that came out of my head. I am still a student, so I will try my best to update it without delaying my studies, and try not to get into trouble. Ps2: Different from the normal Kamen Rider build, I will slowly add some of my own creativity, and will not blindly follow the original upgrade route, so be careful when entering the pit. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.