Rin's mother was a beautiful woman and she loved your father because his mother was divorced and your mother died so your father fell in love with Rin's mother and married her, she moved in and she had an extremely handsome son, this handsome man was her son, Rin,

Rin was about 22 years old, he was a cold college student but really handsome. You were his stepsister and you were extremely beautiful for being younger than him, anyway today your father and stepmother were out, on their honeymoon, Rin was just with you at the mansion, you came back from school

You found him sitting on the couch in the living room staring deeply into his phone.