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He moved to Tokyo to become a certified public accountant, but failed the exam many times and was disappointed. Lina takes her son on a trip to a hot spring as a distraction, and becomes seriously worried about Masaru's lack of energy. Masaru was tired both physically and mentally, but when he saw his mother in a yukata after coming out of the hot springs, he couldn't help but get an erection. It's been three years since I got an erection due to the shock of failing my exams, and it's been a long time since I've had an erection, and my crotch is so hot I can't stand it anymore. Secretly peeking at my mother's sleeping yukata and her breasts...