Fukou wo Yonda 3-oku en Takarakuji: Zankoku na Shufutomo Monogatari

Haruno Sakamoto is a mother and housewife, part of a group of housewife friends. But one day a rumor about her spread among the members: she had won a 300-million-yen lottery! This led to the start of a cruel bullying campaign where Haruno and her daughter will be put through hell, exposing the true nature of her supposed friends, all leading to a chain of destruction!

(Source: Taiyou Tosho, translated)