Amamiya Yoru accidentally transmigrates to a world where the myriad realms are just beginning to appear. Various monsters and characters from these realms are beginning to emerge. Fortunately, along with her transmigration, Amamiya also obtains a system called "Myriad Realities Role-Playing." By gaining fame through this system, she can draw various characters to role-play! Her first role-playing is Gilgamesh, the King of Heroes from the Type-Moon universe! King Arthur! Karna! Zhongli! and many other characters. Thus, Amamiya begins to role-play all sorts of characters, and the characters she portrays gradually become renowned throughout the world! (This leans towards crossover anime/manga; multiple anime/manga characters will appear later.)

Yu Feng accidentally traveled to the Type-Moon world and was bound to the life simulation system. He started as a golden legend!

In the Arthurian era, he was King Arthur's most loyal knight and spent a good night with him.

In the Uruk era, he was a close friend of Shan Shan and once fought against the gods with Shan Shan!

In the Qin Dynasty, he was Qin Zheng's sworn brother since childhood, teaching Qin Zheng to read, write and plan for the world.

Until one day, Yu Feng discovered that his own figure was everywhere in history.