Being deposed, demoted, and dying a tragic death? Li Chengqian says, "This three-course combo, this young master doesn't want it." A 21st-century science and engineering man transmigrates to the Tang Dynasty and becomes the eldest son of Emperor Taizong, Li Chengqian. He figures that since he can't be the crown prince or the emperor, he might as well be a mischievous bear child who teases officials' wives and hugs his elder sisters' long legs—a rather carefree life.