トラブル・ダブル (Double Trouble)

Instead of one Kira, Japan has 2 Kira. The police force thinks that there is one man who is Kira. But like the phrase behind a man's success is a woman, it's the same case.

Yagami Yumeko is a girl who studies in Daikou Private Academy. She is an introverted girl who doesn't say much. She is often bullied when she is on her own for being accused of thinking that she was superior to others. She is in a different class from her twin brother Yagami Light. They don't bully her in front of him not wanting to be caught and no one knew since she never knew anyone. She stumbles upon the Death Note which she gave to her brother. He then named himself Kira and did not show that there was a second Kira who was her sister to the world.