My little sister, Seiran, has loved me since she was little. Recently, she's been acting strange. She masturbates while sniffing my underwear. When she finds out, she immediately seduces me and wants to have sex with me. My little sister's temptations cross the line and are like a storm. She begs for sex day and night! On a dangerous day, she presses her foldable pussy against my crotch and forces me to insert it. I can't stop cumming inside her!