Great Tang: I Asked Li Shimin to Join My Rebellion

Ling Tian thought transmigrating to the Tang Dynasty meant instant success—marry a princess, dominate the court, live the dream. Reality? Nobles steal his business, corrupt officials rob his exam results, and he's left with nothing. Desperate and furious, he befriends a fellow traveler on a pleasure boat, a man he calls "Old Tang." When his cheat system finally activates, Ling Tian makes a bold proposal: "Old Tang, let's rebel and overthrow that tyrant Li Er!" There's just one problem—his new drinking buddy IS Emperor Li Shimin himself.