Wouldn’t truly be Bungo without a tragic backstory abd this time around, we get insight on Yosano previous affiliation to Mori San. You get to understand at how some of her manic traits came to life as we watch her life as a child medic cursed with the task of reviving her allies from near death continuously. It goes as far as to driving her closet friend to the brink of insanity and taking his life as a result.