This... Isn't cheating, right...? Side story to the commercial BL, "Am I, A Virgin With Zero Experience About To Be Jumped By A Ex-Mercy Sexual Berserker!?". It's set after the 5th book but it can easily be read without context. [Synopsis] Yuuto rediscovered a box full of "adult toys" while he was cleaning. On a whim, he decided to play with himself in secret for just a little while while Kuroda was out, but...He came back!? ...Eroticism ensues. From secretly masturbating to having some body size difference sex!