Munou na Nana

Synopsis

After disposing of Yuka'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 Kyoya that Yuka is dead. When Nana, Kyoya, Michiru, Seiya, and Moguo arrive the cliff, Nana claims Yuka committed suicide after she managed to get through to her. After she convinces Moguo to burn the corpses, including Shinji and Kirara's, Kyoya becomes suspicious of Nana until they discover Kaori's body. Kyoya then learns that Kaori had been poisoned via her contacts. Later that night, when Nana, Kyoya, and Michiru head back to Kaori's room, Nana realizes that she made a mistake. When Michiru checks Kaori's phone, Kyoya 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.

(Source: Wikipedia)