Stone God, a mathematical genius, goes to a fixed lunch shop to buy lunch every day just to have a look at Amethyst, the neighbor who works there.
Kyoko, who lived alone with her daughter, killed her ex-husband by mistake.
In order to save Amethyst, Stone God stepped forward to clean up the mess, set up an incredible game with the mathematician's meticulous logical thinking, provided Amethyst with a seamless alibi, and performed a very sincere and pure love with shocking and inexplicable tricks. ......