Departs every Friday 17:45 at the bus station next to auditorium. (Duck pond 17:40, opposite side of W8 17:42) You can get off at Central City Terminal or Sinchon rotary.
Bus fee is 9000 won. You should send your money to the bank account you are assigned in the reservation system. Note that one person can get only one ticket.
There is no bus driven by KAIST on the way back. I recommend you to ride express bus from Central City to Yuseong express bus terminal and then take bus #104 to return. For additional information to return to KAIST, use Kakao Map or Naver Map.
Reservation can be made from Sunday 17:45 to Friday 13:45. The bus may not be available when the friday is a holiday.