Reiko was forced to marry her current husband who worked at the same workplace, but their relationship has stopped for quite some time, and what's more, her husband has been playing sex games. To make matters worse, she was under pressure from her mother-in-law, who said she didn't need a daughter-in-law who couldn't have grandchildren, and she was mentally cornered. One day, when she was comforting her daily frustrations with her own fingers, a chance incident made her feel better about her own worries.