Sumire (Kurokawa Sumire) has just gotten remarried, but her husband is on business trips and doesn't care at all.She couldn't get along with her son-in-law Akira, and she felt lonely both physically and mentally.At such a time when the pain in her body reached its limit, she confessed that she had always liked her from Akira. "I want to comfort Sumire-san even while her father is away." With that earnest thought, Sumire decided to accept Akira for a limited time until her husband returned.However, her Sumire's heart is shaken by the intense pursuit piston that does not stop even if she gets it.