could someone remind me what this whole story was about

Autistic author stalks double faced hottie he thinks would be a great seme ref for his bl book
Hottie thinks author likes him and gets flustered and likes him after shenanigans
Sex cute stuff drama
It ended with Hottie thinking that Autistic boyfriend was just using him for his writing
But he already dropped the idea for the book
They parted ways and meet again 4 years later
Present moment in the manhwa

ohhhhh that was this manga!! thank uuuu!!!