In high school, I became pregnant and eloped against my parents' wishes. My husband later vanished, leaving me to raise our young son, Taichi, alone. One day, my part-time supervisor invited me on a hot spring trip. Seeing it as a chance to get my reclusive son out of the house, I set off on our first journey together as a family. But this trip would expose me to the desires of various men and reveal the true feelings my son harbored for me. Set in a hot spring inn, this is a story of taboo and passion. Taichi told me, "I don't regret anything, Mom. If anything, I've never been happier."