I’d like to introduce a product that can add volume.

This is the Rire Miracle Volume Hair Fixer. It fixes the volume that a hairdryer alone lacks. It is a two-in-one product because it also helps alleviate hair loss symptoms. You just need to shake the bottle and spray it. I didn't see dramatic results, but I spray it to keep the volume from flattening. Since it is said to help relieve hair loss, I use it consistently.