Fault!! 1

During Sugiyama’s summer tennis retreat, his forbidden attraction to step-sister Mio ignites passionate, secretive nights filled with whispered confessions and reckless desire. Their intimate “training” sessions leave no room for restraint, until Saeki—his fiery doubles partner—discovers their affair. Consumed by jealousy and longing, Saeki confronts Sugiyama, unleashing a raw, hunger-filled encounter where bodies collide in heated rivalry, blurring the lines between competition and lust under the scorching summer heat.