While her husband is away on business, Mirai and the father-in-law who lives with them accidentally drink aphrodisiac tea that her sexless husband secretly prepared. Their bodies burn until reason collapses and they fall into sweaty creampie sex. Even after her husband returns, Mirai remains addicted to her father-in-law's cock and the two keep seeking each other out. No amount of orgasms or ejaculation cools the heat, leaving her unable to enjoy her stale married sex again.