It has been three years since Ikumi's daughter started dating her current boyfriend. He visits the house from time to time and their relationship seems to be going well, so Ikumi had no doubt that they would have a happy marriage. However, she didn't realize that when their relationship hit a plateau, her boyfriend's feelings were actually directed towards Ikumi herself. Then, having become close, Ikumi let her guard down and showed her vulnerable side to her boyfriend. He was attracted to her beauty but had been holding back his desires in the name of his girlfriend, but seeing Ikumi like that, he couldn't help it anymore...