Wakana is a friend of Rinko and Tatsuyuki. She is very popular among boys. Back in middle school she was dating handsome senpai Nishino, but he betrayed her. After hearing that, Tatsuyuki got very angry and beat up Nishino.
Wakana fell in love with Tatsuyuki after that, so did Rinko. But Rinko told Wakana that she got a crush on Tatsuyuki. In order to support her friend, she decided to hide her own feelings for Tatsuyuki deep in her heart.