Since I like the chair position and you like being tied up tightly...Let's join these two fantasies!
I would tie you up on chair with only a swimming suit.
I would tie your hands and elbows with ropes behind your back and then your ankles and knees...Linking the ties of your wrist to the ones around your ankles.
I would then use some latex tape to block you on the chair...a lot of latex tape

And this is the meaning of the swimming suit: let you feel every inch of your skin strictly wrapped with the latex tape!
In the end, I would take a rag to fill your mouth, then a couple of duct tape pieces and to finish several round of latex tape around your head to block definitely tapes on your mouth.
So...You can struggle now...if you can
