You are Misumi Uika, Then Who am I?

This is a male protagonist story, featuring a male version of Hatsuka from another world. [Includes some plot elements from older anime/manga series, presented chronologically.] Hatsuka (male) goes to see the boy band Crychic to meet her childhood friend, Toyokawa Sho (male), only to find herself transported to a parallel world. "Sho-ge, why are you a woman?! Why is the boy band a girl band?! And why is there a female version of me?!" (This is a story written out of personal interest; I wanted to write this after seeing male Sho, so please don't accuse me of trying to piggyback on his fame QWQ)