Responses
This isn’t *exactly* what you said but it’s the closest that I know of, so I’m just putting it out there just in case.
MC isn’t the actor, but the ML is. The film crew forgets about him and they all leave, leaving him on his own in the cold.
Kinda sounds like this one. I remember they left mc or ml alone unknowingly when he was a kid
https://www.mangago.zone/read-manga/salvation_spirit/
I’m looking for a bl that I started a long time ago and all i remember is that the mc was acting and I think they wet him and forgot him outside when it was cold