It is a Narcissus story about a man named Mingbie who fell into the flat world and met and fell in love with himself (Madara) in this world.
The main story is about the protagonists redeeming each other.
The idea: Two souls (Ming Ge and Ming GUI) with similar painful pasts and the same loneliness and lack of love see each other and understand each other after meeting. Finally, by accepting each other (essentially accepting another self), they complete self-salvation and the reconstruction of love.
It is not a superficial "narcissus CP love", but uses the bond between the two to explore such deep topics as "loneliness and resonance", "pretend and reality", "how to get out of past trauma" and "the essence of love is self-acceptance"