The present invention relates to a composition containing a compound (A) represented by the following general formula (I) and a compound having two or more polymerizable functional groups (B) in a molecule (except for compound (A)), wherein a mass ratio ((A)/(B)) of the compound (A) to the compound having two or more polymerizable functional groups (B) in a multi-molecule is 30/70 to 50/50:




wherein, R1 and R2 each independently represent any one selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an aryl group, and an aralkyl group; R3 represents any one selected from the group consisting of an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an aryl group, and an aralkyl group; R4 represents any one selected from the group consisting of a (meth)acryloyl group, a styryl group, and an alkenyl group having 2 to 6 carbon atoms; and n represents any integer of 1 to 5.