The OVA is a bonus feature packaged with the special edition of the fourth manga volume. Sayama is a pessimistic student who always wears a face mask to school. When Saikawa, the most popular boy in class, rips the mask off out of curiosity, Sayama loses his temper. Despite his furious reaction, he somehow intrigues Saikawa, who then proposes to tutor him under an odd condition: he can do whatever he likes with what's underneath Sayama's mask. Sayama loathes having his uncovered face, lips, or mouth touched, but he can't resist the pull of Saikawa's attention.
