Desperate for his stepmother Reiko's big tits, high schooler Haruto finds her mature body too stimulating. As he becomes more animalistic, he clings to her breasts, refusing to let go despite her protests. His persistent tongue work drives her crazy, making her moan louder until she can't help but get hot and bothered herself. Their passion reaches its peak when they both lose control, their voices turning into angry cries as they give in to their desires.

父親の再婚相手・怜子の大きなおっぱいが気になる浩司。怜子の程よく熟れた体は思春期真っ只中の男子には刺激が強すぎた。野獣と化し乳房に吸い付く浩司。拒む怜子だが激しい舌使いで執拗にチュパチュパベロベロと舐められているうちに股間が熱くなり怒声が喘ぎ声に変わってしまう…。