Boku no Meikko wa Yandere deshita

Dive into the whirlwind of chaos and comedy as a young man finds himself tasked with looking after his nieces, only to discover that one of them is a yandere! With elements of romance, harem, and mature themes, this Japanese web novel explores the protagonist's unexpected encounters with five young girls, including his yandere niece, in a week that will change his life forever.