The Soto of Seirokai is coming back from the US after getting an adjustment in his pacemaker. Seirokai is planning to proceed with the plan to take over Japan very seriously with Soto's return. Concerned, Saki approaches one of the candidates for membership, Ijuin Kaname of Kyorei Girls School.
Saki obtains an ID card and a mask from her and infiltrates Seirokai as Kaname. However, getting suspicious about her, Ranko, Tsubaki and Hotaru are released to investigate this and they find the real Kaname.
Saki's plot is revealed to the Soto. Having Kaname trapped as a hostage, Saki can't fight as much as she wants. There, Yukino and Okyo appear and help her escape. Saki follows Soto into an underground pathway. He and she confront each other and realize that they both are playing the same melody on their music boxes. She shouts "Who are you? What do you want with me?". He leaves without explaining anything.
