I Refuse to Lose to the Protagonist's Revenge

I reincarnated in another world and met the Child of the World on her second run. In her previous life, she fell short at the crucial moment, and it turns out I was the culprit. She was going to get revenge on me, but I practically delivered myself right to her, and she caught me red-handed. Now she's doing strange experiments on me, and I've even turned into a girl. What should I do? I'm in a real hurry!