[Kameyoshi Ichiko] Tobibako Dekiru kana? (Girls forM Vol. 19) [Can you do a vaulting horse jump?]

Misato, a timid schoolgirl desperate to master the vaulting horse, begs her older brother for after‑class practice, only to discover he’s willing to become her obedient mount. She straddles him, mocking his exposed penis and weak testicles while promising to make him climax in her panties, turning a simple gymnastics lesson into a teasing femdom session. The playful yet dominant dynamic builds tension as she threatens to kick his balls three times before granting forgiveness.