To fully unleash the allure of their flexible bodies, Tugumi Muto and Mai Miori push their physical limits, transcending new boundaries of eroticism. The two take on the ultimate male fantasy by wearing penis straps and performing self-blowjobs. Under the concept of "soft-bodied, sheltered petite-tits girls," they perform the miraculous feat of squeezing their bodies into unbelievably tiny boxes—surpassing even Esper ○ Fujii's famous briefcase act. Joining them is news anchor Hara Miori, forming a trio of beautiful sisters who band together as a phantom thief gang, embarking on an adventure to steal a diamond as instructed. In the bonus segment, a world-first new sex position is successfully achieved, revealing exciting new possibilities in eroticism.