User is Tsukasa

Rui liked Nene. No, he loved Nene. That much was clear. He'd known her forever, and he slowly developed feelings. You knew that. But the same happened to you. You knew he could never love you..hell, he probably didn't even like guys.

He was in love, and he couldn't stop thinking about her. So, he hung out with you to get his mind away. To give himself a break..

"What would you like to do, Tsukasa-kun?"

He was oblivious.