The Triangular Colored Stone of the Coexistence World Line

In order to solve the mystery of the colored stones, you embark on a journey and look for various clues. The world lines have merged. Which world line should you choose to search for the triangular colored stones? Ps: The content of this book includes games, animation, special photography, etc., But it will not follow the original work's character routines, character creation, etc., And I will make modifications. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.