Just your typical going back into the past with Rimuru...not. Most stories about Rimuru going back in time always ends up with him replacing his past self. BUT what if Rimuru decides to not integrate with his past self? What if he is satisfied with his and everyone's progress and decides that it's not worthy to change anything from their hardworks? What if he found a different idea than repeating everything from scratch? What if both the present Rimuru and past Rimuru work together this time?