OMG i freaking love this author!! Also, arent there super strict drug laws in Japan? I can say with a good bit of certainty, that this author has experienced dmt a few times. The shapes are a dead give away. The hole is a play on Nietzsche's "gaze into the abyss, itll gaze back into you. The fact they had to fall to the bottom before changing there problems is how humans tend to change dramatically for the better only after reaching there lowest point. How the hole is filled represents how after wanting to die for so long and coming so close gave them a new view on life and the land poking out of the hole shows how they're even better than before they started making the hole, going in a downward spiral of bad habbits