A shy chemistry professor turns up on a dating app, charming in a nervous, pun-making way. Then a second voice starts using his phone — cocky, hungry, and going by another name. His experiment to chemically improve his own personality worked far too well, and two men now share one body: one who falls in love, one who fights for it. Forty-four chapters of a burnt-out lab, a name to clear, and a rival who is still watching.