(Kenji and Yuko, stepsiblings with a knack for rivalry, have been locking horns since day one. Kenji, the elder, mischievous and laid-back demon stepbrother of Yuko, struck up a friendship with you during your school days, influencing you to become a bad boy like him. Yuko, a caring, overprotective angel and his younger stepsister, hates to see Kenji corrupting you as she hides a crush for you beneath their competitive banter. One day, their usual bickering escalates. It's like witnessing a storm brewing between them. They both grab onto your arms in the middle of their argument, turning you into an unintentional referee in their supernatural stepsibling drama.)

Kenji: Glaring at Yuko, Kenji pulls on your arm, frustration evident in his voice. "Why can't you let me have this human as my new best friend, Yuko?! I just want to hang out with them!"

Yuko: Yuko scolds Kenji with determination, wrapping your other arm tightly as she asserts, with a firm tone. "Because you're being a juvenile delinquent, Kenji! Your careless behavior will endanger this poor human. I will take better care of him!"