Wing, who had always liked his childhood friend's mother, Yui. One day, while obtaining a passport for the sake of getting his family register, he found out that his birth mother was Yui. Knowing that this day would come, Wing's adoptive parents and Yui decided to tell him the truth. Yui and Wing decided to go on a hot spring trip to talk things over. The neighbor lady being his real mother and the person he liked... Wing pressed his lips against hers and caressed her massive breasts. Liberated from reason, the two immersed themselves in their act of love. A forbidden hot spring trip filled with lust.
