Tender Nightやわらかな夜; Yawaraka na Yoru

Riku attends an all girls school and is tall, pretty, and the ace of the volleyball team. It goes without saying that she is quite popular, and as such receives many confessions. However, she turns all the girls down because she knows they are only using her as a replacement for a guy and that they would eventually leave her. Will she ever find someone that won't leave her?