Responses
Yeah the long haired guy was the guide from the rich family im pretty sure. Bc at the end of the flashback the doctor was the guy in the glasses, he looked younger in the flashback and he still had his old face. It couldn't have been gaha bc gaha was shown to have known the doctor after the body switch.

If that doctor stole his master’s old body, does that mean the master (the one he caught being unfaithful) was the illegitimate son that the wealthy family invested in? Or was it the doctor’s original self before he swapped bodies?