Breaking The Boundaries : BabyMetal Harem x Male Reader

Y/N, a freshman Highschooler- was never a popular kid, he was considered an "Outcast" by the other kids at his school, even the teachers always believe he was trouble simply he keeps himself hidden behind a mask--because he always afraid of showing his "true self" too the world because he believes it would do more harm than good, if everyone discovered his true appearance, one day though he received a special package from the Principal in inside the package was a invitation to a BabyMetal concert. Now what will happen to the shy, withdrawn boy-he meets Japan's most famous kawaii metal band?

[I don't own shit that's inside the book, expect the plot of the story itself. ]