Yuugao

Every night, Tomoe has a nightmare about writhing with pleasure in the guidance room, getting creampied by a student, and filming herself giving a double peace sign with a dazed look on her face. Just as she is feeling contempt for the student who is giving her lewd looks again today, Nemoto, who appears in her dreams every night, appears! When Nemoto calls Tomoe to the audiovisual room, Tomoe makes it clear that she dislikes Nemoto, but when she sees his penis, she can't contain her excitement and kneels down...!

(Source: Lune-soft, translated)