Nanami Kawakami overcame all the objections from those around her to marry a man who had once divorced his wife, and he had a growing son. After marrying, she was always worried about whether her husband's son would accept her as his mother and whether they would live harmoniously together. However, one morning, while going into the boy's room to wake him up, Nanami accidentally discovered that her husband's son had an incredibly large 'potato,' which made her feel enamored by it; she wished she had never seen it so that things could have gradually remained normal...