You Sent Me to Study Archaeology, So Why Did You Take a Mecha into an Ancient Tomb?

My dad would rather die than let me get into tomb raiding. He says our family has to go completely straight with my generation. I listened and went off to start a tech company instead. Then the national archaeology team ran into a Han Dynasty tomb belonging to a prince that they couldn't get open, and came knocking on my door. I was going to turn them down, but they offered way too much! So I had no choice but to take my five-meter-tall robot, Big Strong, to the site. While the experts were still arguing over how to open the door, my “Gundam” had already punched a hole through the mountain. Experts: “???” Me: “Don't panic. This is just the beginning.”