#rivalry

Harry joins a group of Ravenclaws plotting to ambush Draco Malfoy and the Slytherins during their secret dueling practice.

A teenage brother seduces his 14-year-old sister while their parents are away on vacation.

A bad boy schemes to win his love interest away from his rival brother while secretly scheming to share her with his own sister.

Two teenaged stock car racers from competing backgrounds discover a mutual attraction after a hard-fought finish at a Kentucky dirt track.

A shy, bullied young man plots revenge against his twin sister's longtime tormentor Jessica, who has crushed his confidence and love life since childhood.

A young man magically inhabits his gorgeous step-sister's body and plans to use it for revenge.

A Grease-inspired tale of high school street racers and their rival gang, with romantic entanglements between the boys and their girl counterparts.

A younger brother grapples with fear after his older sister discovers his panty-stealing habit, only to find she's known for ages and welcomes his fascination.

A teenage boy recounts losing his virginity with his best friend's older sister and pursuing younger thrills with her little sister.

A teenage boy struggles to hide his secret life from his sharp-tongued sister while fantasizing about girls he can never have.

A husband is surprised when his wife's visiting younger sister openly propositions him and shares intimate details about their marriage.

A boyfriend is seduced by his girlfriend's younger sister and ends up exploring taboo sexual encounters between them.

A young woman is caught masturbating to lesbian porn by her twin sister, who smirks and catches her in the act.

After losing a friendly school bet, Kairi must fulfill Selphie's mysterious request during their summer vacation.

During Geminar's war, multiple women secretly watch Kenneth and Mexiah's passionate coupling, each becoming consumed by their own jealous and curious desires.

Ross schemes to break up his crush Shaun with his girlfriend Alice at Derek's school party so he can finally have Shaun to himself.

April resents her sister Bianca's whirlwind romance and marriage to the handsome Italian Vittorio, straining their sibling bond in Summer Bay.

Two teenage girls on a sleepover are teased into watching porn and experimenting with the older brother.

A boyfriend is shared between two sisters who compete over how much he fills them up.

A reluctant teen girl and her nerdy classmate are forced on a family camping trip where sparks unexpectedly fly.