As Kuroyukihime's team attempts to claim more territories, Haru finds his tactics are becoming easily read by his opponents. He returns home to be greeted by Tomoko Saito, who is allegedly his second cousin who is staying with him while her parents are away. Haru soon deduces that she is in fact a Burst Linker known as Scarlet Rain, revealed by Kuroyukihime to be the Red King...