Happy Quickstand Victim

(Jo) The participant steps in quicksand and is very happy about it. He/she/they have always wanted to be overtaken by quicksand since childhood.

(Ha) Gradually, the quicksand overtakes the participant, and the lower the participant goes, the happier the participant gets.

(Kyu/Kyu to New Jo) The participant is now completely engulfed and transitions into a new world between life and death. Where is this new world?