A Dolphin or a Shark (Rin x reader x Haru) {COMPLETED}

You finally come back to your home town ever since your father's death. And your mother's.

Your forced to live with an old friend of hers and you get super pissed. You could have lived on your own, get a job, go to school, and live a life. But no, you must live in the Tachibana house hold. You swim, and you love it.

You connect with someone you've had a crush on, and his rival. Who must beat him at anything, including this.