Yoo Jeong-yeon, known mononymously as Jeongyeon, is a South Korean singer. She is a member of Twice, a South Korean girl group formed by JYP Entertainment. Wikipedia
The story follows obsessively lovesick schoolgirl Ayano Aishi, nicknamed "Yandere-chan", who takes it upon herself to eliminate (through either violent or non-violent means) anyone she believes attracting the attention of her "senpai", Taro Yamada.
