"All of a sudden," Alyosha muttered.
Ryou turned to Alyosha. He just realized that Alyosha was sitting leaning on Ryou's body. And Alyosha looks very comfortable leaning on Ryou's body. Every now and then Alyosha corrected the position of her head so that it really leaned against Ryou's chest.
"What's the sudden?" Ryou asked. He didn't know what Alyosha's words meant. Alyosha really likes not finishing his sentence. And that made Ryou confused.