I want a seating area in my compact bedroom.
The most convenient way would be to bring an ottoman in the room.These come in various sizes,colours,designs, and patterns.Apart from being used for seating,it can also be used for storage.
Another option is to make a window seat, i.e. seats beside the window of any of your rooms with a storage space beneath.
Hope I solved your query!
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Ottoman is a good option. Like you said, you can use it for storage and you can use it for seating as well.