Perfect Cage

2145, Perfect intelligent federation. My beloved died tragically, and I became a useless person, imprisoned in this impeccable "perfect cage." When I was desperate, a mysterious "system" came to me and promised to give me the power of revenge. The price is - sacrificing my emotions, talents, memories, and even my humanity. I made a deal with the devil, regained my life, rose from the ruins, and tore apart the pretense of the world amid the roar of mechas. However, as I got closer to the truth, a mystery that shattered my soul emerged: The "savior" who gave me everything seems to be the "murderer" who killed my lover with his own hands? Is my revenge, my struggle, nothing more than an elaborate game played by higher-dimensional beings? When the chess pieces have the power to overturn the chessboard, what awaits me is a new life or another more perfect cage?