Just the two of them at a hot spring inn... I impregnated my mother, who was remarried, on a premarital trip.

I lost my father when I was a child, and I have lived alone with my mother forever. Although she was sometimes strict, she had finally come to love her beautiful and kind mother as a woman. However, after I got a job, my mother seems to be trying to remarry a man she met at work and live a second life... One day, I invited my mother on a hot spring trip with my mother to celebrate her pre-marriage. To convey not "thank you for the past" but "love for the future"...