Three and a half BadAsses (DRRR! fanfic)

Erin and Merry do not have a nice past. Having moved to Tokyo to avoid incarceration, Erin meets two people who turn her life upside-down. AS she tried to figure out what she'll do with the two new love interests in her life, tension rises between her friends and the Yellow Scarves. Forced to pick between two, Erin has to take matters into her own hands to keep her sister safe.