Code Name Verity Steaminess Rating

Exactly how steamy is this story?

PG

Nothing steamy happens in Code Name Verity, but it gets a PG rating mostly for the totally wrong stuff, like the Gestapo cook's giving Julie recipe cards to write on in exchange for letting him grope her and Paul's constant sexual harassment of every woman in sight. There are a couple of sweet, though not remotely steamy, kisses between Maddie and Jamie that also contribute to this rating.