Abstract: A resin composition containing an acrylic block copolymer (I) and an acrylic block copolymer (II) at a specific proportion thereof, wherein the acrylic block copolymer (I) has at least one polymer block (A1) containing a methacrylic ester unit and at least one polymer block (B1) containing a specific acrylic ester unit and satisfies a specific requirement, and the acrylic block copolymer (II) has at least one polymer block (A2) containing a specific methacrylic ester unit and at least one polymer block (B2) containing a specific acrylic ester unit, and the acrylic block copolymer (II) satisfies a specific requirement.

Abstract: A method for forming a protective film includes directly or indirectly coating only a periphery of a substrate with a composition. The composition includes a compound having an aromatic ring, and a solvent. The solvent includes a first solvent having a normal boiling point of 156° C. or higher and lower than 300° C. A content of the first solvent in the solvent is preferably 20 mass % or more and 100 mass % or less. The first solvent is preferably an ester, an alcohol, an ether, a carbonate, or a combination of two or more of an ester, an alcohol, an ether, and a carbonate.