Yu plans to undergo gender-affirming surgery next year and live in a woman's body, but she wants the transformation to reach deeper than appearance alone. Hoping to feel like a woman in both body and heart, she asks Kanna Hirai to guide her through an overnight prostate-training trip. Kanna is beautiful, gentle, and even more understanding than Yu expected, listening closely to everything she wants. Convinced she can safely surrender every part of herself, Yu entrusts Kanna with the training and asks her to make that long-held wish come true.