Byplayers: What If Supporting Actors Lived On a Deserted Island for a TV Tokyo Morning Drama?

Cast in a new morning drama series, our five leads head out to an isolated house on what appears to be a deserted island via boat. Finding no crew or other castmates, they turn to leave, only to find that their boat mooring was undone by wild monkeys. Forced to survive for 20 days without contact, they're finally rediscovered by the crew, only to realise that their roles had been recast and that they ended up on this island through incorrect directions as it was the original location that had since changed. Forced to live together in the same house due to no lodgings available in the actual filming location, the actors must take unnamed minor roles in the series to ensure the whole endeavour isn't a wash ...