Mako was extremely shaken by her son's childhood friend, Kentaro. She had noticed that Kentaro had had special feelings for her since they were young. However, she thought that he would forget about it when he became an adult... "I've always decided that you would be my first partner!" Hearing Kentaro's words, Mako's Kokoro wavers as she realizes that he is serious. And the moment she became aware of Kentaro as a man, she felt a heat rise deep inside her body...