Kyo has always been shy and shy, and was always made fun of by those around him, at the bottom of the hierarchy. His classmate Mika, whom he secretly admired, also always looked down on Kyo and scorned him... Later, when he entered society and became a colleague with her at work, she didn't remember him at all and treated him kindly. Feeling a sense of anger with nowhere to go, Kyo secretly gave her aphrodisiacs and plotted his revenge, hoping to ruin everything about her happy life...