In what way does Paul explain ἄφεσις, forgiveness or release of sin in Romans?

In Matthew's account of the Last Supper, Jesus speaks about the significance of His blood: for this is my blood of the covenant, which is poured out for many for the forgiveness of sins. (Matthew 26:28 ESV) τοῦτο γάρ ἐστιν τὸ αἷμά μου τῆς...