Save the Miyano Sisters with Twelve Talismans

Mioto Shiratori came to the world of Conan through transmigration. He has memories of his past life and is familiar with the plot of Conan, but cannot remember the specific details. There are twelve talismans as cheats without system. The single heroine is Miyano Shiho. The position is red but has its own style of doing things. Use your own abilities to make up for the regrets in Conan, change the key plot, and change the growth trajectory of important characters in the original work. Don't dismantle CP