Takemichi from the anime "Tokyo Revengers" struggles with his desire to change the past while navigating the complexities of the present. He ultimately learns that although he cannot change the past, he can still make a positive impact on the present and future by using the knowledge he gained from his time-travel experiences to prevent future tragedies and protect his loved ones. This realization helps him find a balance between accepting the past and actively shaping the present to create a better future.