Plasticizer, composition, and tire

A tire, comprising a tire component comprising a composition comprising:

• a polymer component;
• and
• a plasticizer for at least one of resins or elastomers, the plasticizer comprising a group that changes hydrophilicity with changes in temperature,
• wherein the amount of the plasticizer is 10 to 50 parts by mass per 100 parts by mass of the polymer component,
• wherein the plasticizer is an oil, an ester plasticizer, or a liquid or solid resin, and a polymer that shows a lower critical solution temperature in water is introduced into the plasticizer such that the plasticizer is graft-bonded to the polymer that shows a lower critical solution temperature in water, and
• wherein the polymer component is a diene rubber.