Both leads are reborn + two male leads
Shen Shiyu was deceived by a scumbag into marrying the Regent despite being a man, then stole vital military intelligence and caused the Regent to fall into a desperate predicament. Fortunately, he came to his senses at the last moment and leaped from the city tower.
Reborn, he returned solely for revenge, vowing to drag them all into hell.
Gu Yunqi, carrying the grief of his entire family being murdered, rose to the position of Regent through his own efforts. Yet he was deeply in love with Shen Shiyu. When Shen died before his eyes, Gu Yunqi took revenge, then killed himself to join him in death.
Super beautiful, love it, love it