Arakawa's first love is Nanao, the mother of his friend, whom he has secretly admired since childhood. - She has a beautiful face that never fades even with age, and beautiful big breasts. - My heart flutters at the kindness of the people who always take care of me. - But Nanao is my friend's mother. - No matter how much I think about it, this love will never come true. - Just as he was about to give up on his hopeless love affair, he happened to learn Nanao's secret. - Arakawa can't contain his excitement as he comes into contact with the slutty side of the woman he admires.