My Dark, Clingy Dead Husband Flirts with Me Every Night. Train This Dog While You're Young

In a sentence: The heroine is reborn in her gloomy, unhinged late husband's boyhood, and gets to enjoy the good stuff five years earlier!

Five years after her late husband, Jiang Shijin, passed away, Sang Wu missed him so much she fell ill.

She opened her eyes, only to find herself back in her late husband's youth!