I Play a Supporting Role in a Fantasy World

He traveled through time and became a supporting villain in a fantasy world, but was he destined to become a mentally retarded cannon fodder used for hydrology? Is it used by the protagonist as a stepping stone to show off and lead a girl? Or drugged the heroine and was taken advantage of by the protagonist? Or maybe even the fiancée ran away with the protagonist? Fortunately, Lu Ran woke up Da da da da da da lot, lot, lot, lot This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.