Talented vs. Talentless Part 3

Nōryoku-sha Bāsasu Munōryoku-sha Pāto Surī (能力者VS. 無能力者 PART3)

After disposing of Yūka's body, Nana comes across Kirara, who explains that she had a fight with Kaori. Nana then poisons Kirara and forces her to give up her phone's password. Afterwards, she heads to Kaori's room to tamper with her contact case. In the hallway, Nana tells Kyōya that Yūka is dead. When Nana, Kyōya, Michiru, Seiya, and Moguo arrive the cliff, Nana claims Yūka committed suicide after she managed to get through to her. After she convinces Moguo to burn the corpses, including Shinji and Kirara's, Kyōya becomes suspicious of Nana until they discover Kaori's body. 

Kyōya then learns that Kaori had been poisoned via her contacts. Later that night, when Nana, Kyōya, and Michiru head back to Kaori's room, Nana realizes that she made a mistake. When Michiru checks Kaori's phone, Kyōya becomes convinced that Nana is the killer. He waits until some of their classmates arrive to explain how Nana killed Kaori. He then checks Nana to see if she still has Kirara's phone.