Due to an accident in her youth that required blood transfusion and subsequently given succubus blood, she gained succubus abilities.
i.e. she has the ability to give people erotic dreams
Her concept of chastity is rather low in dreams. (※That said, she hates being used purely for her partner's pleasure.)
referring to the erotic dreams she induces
However, in reality, she is a prudent girl who refuses to make herself look lewd or slutty, not even a little bit.