This has been bothering me for a while now, and I'm pretty sure this exists, but it's about a guy who buys some used female model sexdroid and it turns into a guy? And it basically is pining after the owner and was happy he had bought him even though the owner was upset about him turning into a guy? Anyone remember anything like this

Last chapter from Barairo emperor?
I've read quite a few with the same theme so maybe it's in this list or this one.At home happy system is also kinda similar.