Is my sister a magical girl or a lily!

Transmigrated to become the younger brother of Yuanshen (although she did not become a god in this world line), and witnessed Xiaomei Homura's countless reincarnations as a three-year-old kid (although the end of the reincarnation this time was still due to Madoka's wish) , now, ten years have passed (although it was carried out without entering the Warcraft chapter), after Homura lost the ability to go back in time, the old batch of magical girls has matured, and the new batch of magical girls is still immature , but there is no problem with these, the problem is that my sister is entangled by the nymph Akami Homura, what should I do?Wait online!urgent!
PS: This article mainly borrows the setting, the plot and most of the characters are original.