i like kinda forgot too but i think its like if a tape is inserted then that player who inserted it gains consciousness but if removed they become an npc and that removed tape contains all their memories now since there are a bunch of tapes you can insert a clean tape and gain consciousness but have no memory of the incidents recorded in the previous tape and doha's tape was removed by the glasses guy the one w most memories and then during the start of this manhwa doha inserted another tape which was clean so now he has 2 tapes

Can someone summarize to me the tape situation? Why dos doha have two separate tapes..? How does this tape thing work