Oh, is there only one RO? The gacha system's description made me think it was planned to be more player-choice. Would definitely be more likely to try the game out if it has more options than just the King i'm not super drawn in by.
The name of the game is King-Sized roommate, and the backstory alongside it would feel weird to have more than one romance option
EDIT:
Okay nevermind i looked on the description, there will be more characters that will appear and you can have romance options with them
But they aren't in the demo, they're a future build plan