Liu Man, the president of the martial arts club of Shanghai University of Magic, awakened to the nanny system after falling out of love. His good friend Yang Nono asked him to pretend to be her boyfriend in order to avoid urging her to get married. Unexpectedly, the word "dad" made the system bind Yang Nono as his adopted daughter. Liu Man personally protects Yang Nuonuo under the system mission, resolves the crisis in the martial arts school, and takes away the evil neighbor Green Tea. The relationship with the fake boyfriend gradually grows. When he reveals his hidden strength and the two pretend to be real, the ultimate secret of the system is still hidden in the mist. What kind of test will this love bonded by the system face?