This is a very unique plot. I haven’t encountered one like this before. I agree with the other comments saying Jio is likely an unreliable narrator due to the passage of time spent in the portrait. I’m excited to see what comes next.
https://www.mangago.me/read-manga/i_m_actually_a_cultivation_bigshot/
Is similar in themes, mainly an MC that doesn’t realise their impact on reality, and a mystery about who they really are. The cast is much bigger though, and if you aren’t into the art style, it might not be for you. A bit more of brash humour too. But definitely give it a shot if you enjoy unreliable narrators! They make the whole thing hilarious
HELLO, what are you doing??? TAKE THE MONEY AND LEAVEEEE.