Tokyo: Bubble, but the system is Sengoku.

In a shocking turn of events, a young man survives a car accident only to find himself transmigrated to a bizarre world known as "bubblegum Tokyo." As he navigates this unfamiliar realm, he discovers that he has been granted a system, but with a twist - he is now an actor with a lowly identity as a karaoke singer, and his system is woefully outdated. However, the Sengoku system, which he initially deemed useless, begins to exhibit strange behavior, drawing him into a series of unexpected adventures. From being cast in a samurai battle royale movie to casually chatting with actresses and his idol at an awards ceremony, his life becomes a whirlwind of drama and intrigue. As he takes on various roles with convincing ease, fans and critics alike begin to suspect that Sato Ryo's performances are more than just acting - they are a glimpse into his true self. Years later, the truth becomes clear: Sato Ryo wasn't acting at all, and his remarkable talent was merely a reflection of his authentic experiences in this strange new world.