Warau Ishi

Ataru Natsumeda is a quiet high school freshman struggling with average grades and a strained family life. His sister, Tsukimi, is intelligent and attractive, making Ataru feel inadequate. After being bullied by delinquents who target his sister, Ataru is approached by his classmate Nirasaki, who questions his passivity. She gives him a mysterious "wishing stone" with a kiss, urging him to stay silent. The stone is said to grant any wish. Ataru uses it to wish for the bullies' deaths, and they die in strange ways. The nature of the stone, Nirasaki's identity, and the consequences for Ataru remain unclear as he enters a dangerous new reality.