Question: Wrinkled shirt, no iron!
Option 0: Don't panic. Hang the shirt on a hanger in the bathroom and run the shower or fill the tub with very hot water and let the room fill with steam. Wrinkles will disappear in about 10 to 15 minutes.
Option 1: Don't panic. Hang the shirt in the shower and run the shower over it with very hot water and let the room fill with steam. Wrinkles will completely disappear in about 10 to 15 minutes.
Answer: 0