Kenji's parents divorced and he lived with his father and younger brother. His father remarried a woman named Mako, who was a subordinate, but he decided to go on an overseas business trip and began the life of a mother and child. Kenji, who was attracted to Mako's plump and seductive big breasts, involuntarily gets an erection while taking a mixed bath with Mako. And Mako, who has no husband, is also frustrated and reacts to her stepchild's vigorous sexual desire. And Kenji witnessed his younger brother being spoiled by Mako's boobs, and the tag of desire finally came off ... #班長P