After being married for six years, Akari Mitani finds herself longing for some excitement in her sex life. She decides to try out bondage play again but realizes she hasn't used the restraints in quite some time. When she tries them on, she discovers that the keys won't open the locks, leaving her trapped in the bindings. Feeling embarrassed, she calls a locksmith hoping he can help her escape. However, when the locksmith arrives at her home, he becomes aroused by the sight of Akari bound and helpless. Despite her initial resistance, Akari succumbs to the pleasure of being restrained once more and ends up inviting him back to her house multiple times.
