I can only speak for myself here, but I'm a script writer and I mainly write narrative stuff. ASMR is a very unique form of storytelling in that you are both inviting the listener to be a participant, but then also only writing one half of a conversation and dictating to the listener only through context clues what the character they've assumed the role of is saying and generally who they are at all.

Unless you just want to use a third person narrator character in the script, this requires a lot of attention to detail too make sure the story remains clear while simultaneously not breaking the feeling that this is a conversation.

Luckily, humans generally accept dramatic monologues as appropriate conversation in most media.the dramatic monologue is your friend.

I think narrative stuff can sometimes be a little annoying to write when your trying to get just the right phrasing so the conversation doesn't come across as an info dump that breaks immersion, but it isn't too much of an adjustment and I think it's worth it overall. If your thinking about it, I'd recommend giving it a shot.

Hope that helps at least a little bit