A sheet of marriage contract, Tang Junyao is forced to start a three-month hidden marriage cohabitation life with Ji Hancheng. Guarding against each other when first meeting, one wholeheartedly completing grandfather's dying wish, one wholeheartedly concluding the other is plotting family background, everything is separated extremely clearly. The firework-filled shared-rent days are full of laughs and errors, calculating meal money, ring martial arts exchange, facing rights and wrongs head-on. In the trivial getting along, edge-filled Ji Hancheng slowly catches sight of the girl's independent soft inner heart, prejudice little by little collapses. When the divorce agreed date steps closer, Ji Hancheng who originally looked forward to liberation suddenly falls in love, puts down pride, and starts fancy-style wife-chasing.