Urethane resin-forming composition, adhesive agent, cured product, and production method for cured product

A production method for a cured product, comprising:

• a step of mixing a first agent containing a main agent (A) with a second agent containing a curing agent (B) to obtain a cured product containing a urethane resin,
• wherein the main agent (A) contains an isocyanate group-terminated prepolymer (A-1) which is a reaction product of a component (a) containing a polyol (a-1) having a number average molecular weight of 2,500 or more and a polyisocyanate (a-2),
• wherein the curing agent (B) contains at least one diol (B-1) selected from the group consisting of an aliphatic diol and an alicyclic diol, and a diol (B-2) represented by Formula (1) below, and
• wherein at least one of the component (a) and the curing agent (B) contains a polyfunctional component
• in the formula, L is a trivalent group consisting of one or more atoms selected from the group consisting of a carbon atom, a hydrogen atom, a nitrogen atom, and an oxygen atom, and R is a group having at least one ring structure selected from the group consisting of an alicyclic structure, an aromatic ring, and a heterocyclic ring.