Tiburcio asked Anastacio to join their group for a "session". Thinking that it was for a mahjong session, Anastacio agreed. Upon reaching Tiburcio's house, Anastacio discovered that it was actually a shabu session. At that precise time, the place was raided by the police, and Anastacio was among those arrested. What crime can Anastacio be charged with, if any? Explain your answer.