Katayama, a company employee who fell in love at first sight with Reiko, takes advantage of her husband's absence to assault her and takes compromising photos to make her his. Unable to tell her husband the truth, Reiko endures Katayama's anal torment. On the anal training blog that Katayama created, Reiko feels a sense of dread in her training process, yet her heart is gradually captivated by unknown pleasures.
