Responses
It was explained why.
Nia essentially personifies Yohan to be Entropy (the inevitability of the end as chaos only increases but never decreases) - and she is the singularity which makes ‘Entropy’ decide that they dont want the ‘end’ to come anyways.
The how is simple - hes literally cthulu. I dont believe there were any plot holes, especially when the whole theme of cosmic horror is the existence of the unknown. Everything has an answer even if we cannot fathom it.
/::: the story was too short to explain much. i feel like theres no REAL explanation for why or HOW the ml chose to deceive her. Like Ik why but there are soooo many plot holes idk.