"Prince Luigi: Never Alone" (A Luigi's Mansion AU fanfic)

An AU I decided to make about Luigi's Mansion.

In this AU, King Boo finds Luigi as a toddler, alone on the streets. Luigi doesn't remember his family and won't be able to survive for much longer alone. King Boo decided to adopt Luigi and raise him. Stuff happens...

(Note: Mario and Luigi doesn't know that they're actual brothers when they meet.)