This is a story in which a self-contained system of time travel transforms a young (otaku) girl with upright and positive outlook on life into a yandere and big devil.
The supreme code of yandere:
He can carry a machine gun, and he can handle a hatchet;
He made his love rival dead and made him imprisoned.
Horizontal comment: heartbroken and crazy
Minesweeper: 1. This article is bg
2. The CP of this article has not yet been determined, so please feel free to...
3. It may not be 100% accurate to the original work. Please do not take it seriously╮(￣▽￣)╭