The two rival captains of the sports clubs become step-sisters when their parents remarry. They have a lesbian fight in secret so as not to worry their parents! They make each other cum with hair pulling and slapping! They turn their frustration into sexual desire and engage in lesbian kissing, fingering, and tribadism! They have a silent foot fetish showdown in the kotatsu! They try to hold back their moans, but the squelching sounds of their love juices echo...