Unlikely Siblings

A new addition to the Asahina Family leaves the 13 siblings dumbfounded. Clearly, she isn't who they expect her to be. Includes unrealistic yet realistic moments where protagonist is a girl and brothers are brothers who have no idea how to deal with a pubescent girl in their home, so they call for backup. Also includes a protagonist that isn't defenseless, has a personality, and has no idea what life has in store for her so she just tries to survive the world with memes and her pepper spray. Includes Humour, Family and (fine, we'll put Romance in here too)