Composition, artificial nail composition, nail decoration material, artificial nail, stored container, image forming apparatus, and image forming method

A composition comprising:

• an acrylamide compound (A1) having a molecular weight of 150 or greater but 250 or less;
• and
• a multifunctional polymerizable compound (A2),
• wherein a solubility parameter (SP value) of the multifunctional polymerizable compound (A2) is 10 (cal/cm3)0.5 or less,
• wherein a content of the multifunctional polymerizable compound (A2) is 15% by mass or greater but 35% by mass or less,
• wherein a content of the acrylamide compound (A1) is 64.8% by mass or greater but 75% by mass or less,
• wherein the acrylamide compound (A1) is represented by at least anyone selected from the group consisting of general formulae (1) and (2) below,
• where in the general formula (1), R1 represents a hydrogen atom, or a straight-chain or branched alkyl group that comprises 1 through 4 carbon atoms, R2 represents a straight-chain or branched alkylene group that comprises 1 through 4 carbon atoms, R3 represents a straight-chain or branched alkyl group that comprises 1 through 4 carbon atoms, and a total number of carbon atoms in R1, R2, and R3 is 2 through 6,
• where in the general formula (2), a ring X represents a nitrogen atom-containing ring structure that comprises 2 through 5 carbon atoms, R4 represents a single bond, or a straight-chain or branched alkylene group that comprises 1 through 3 carbon atoms, R5 represents a straight-chain or branched alkyl group that comprises 1 through 3 carbon atoms, and a total number of carbon atoms in the ring X, R4, and R5 is 3 through 6.