There's this manga I read a while back, and I recently remembered it, but I can't find it anywhere! It's about this boy who tries to save this girl from a guy with a gun on a subway when they're little kids and he tries to shoot her because she's the heir to her families robotics company, and they meet again in high school and they're both part robot? I only read the first few chapters, but I really liked it, and I can't remember what it's called.