stated virginity
When a character is specifically stated through dialogue, written on something within the scene (e.g. an identification card), or by other text in the post (commonly seen in model sheets) to be a virgin.
Note that the statement must unambiguously state that the character has no sexual experience. If the statement allows for the possibility of some prior sexual experience (such as saying "I've never done <specific sex act> before"), use inexperienced instead.