I love the wallpaper on the ceiling idea and the heart picture thing on the wall better than this couch thing. The pic says this couch thing was in a girl teenager's room. I think that is a bit much for a teenager's room.
Window seat for exterior wall with baseboard heat- raise entire builtin to furniture height OR put mesh on bottom of entire unit, both to let the heat out into the room. girl& bedroom // built-in desk // Nest Studio