Temp fluctuation in the bedroom will kill the fish, whether freshwater, brackish or saltwater
Unless you're willing to compensate with either with a chiller, or leaving your air-cond on for the next 24/7/365.
Even so, that nano-sized tank won't do. Water body is too small and is too susceptible to sharp changes in temperature and water parameter.
Else..forget it. Unless you have a certain fetish of watching a healthy fish slowly poisoning itself with its own piss and crap and dying slowly for the next few weeks.