Transferring tool (1), which is an application product according to the present, is characterized by comprising: agglutinant (55) which is a material for application, containing a photochromic compound that exhibits color when an ultraviolet light which is a certain wavelength light having a certain wavelength is irradiated thereon and becomes colorless when a visible light is irradiated thereon, that enters a state of exhibiting color when the certain wavelength light is irradiated thereon and enters a decolorized state when a visible light is irradiated thereon; case (2) which is a container in which said agglutinant (55) is accommodated; and irradiation unit (34) that is attached to case (2) and enables agglutinant (55) to be in a state of exhibiting color by irradiating an ultraviolet light towards passage region (X) that agglutinant (55) passes through within case (2) upon being applied onto a subject.