An Upa x reader that features the (female) reader, an ex-mafia member, in Namba. She is moved to cell 8 due to her increasing reclusiveness. She hides her gender (and her past) from her new cellmates, though it becomes increasingly difficult as enemies from her past begin to return.

Nanba Prison, the world's most formidable prison, the location is unknown but that is not important. What's important is, inmate number 1314, Sen Michiyo, will now live in Nanba Prison where inmates are predominantly male and both prisoners and guards are far from normal. She has escaped many prisons in the past but she's having issues to get out of this one?! She can't work out why she's unable to escape...perhaps fate wanted her to stay behind and find something here? What will her story become by staying in this inescapable prison? Collaboration with my dear friend, Fumi-chan!

Highest rank= #1 in nanbaka(2/28/2020) No.1318, a girl that murdered scientist, auctioneer, and massacered a family, her motive is yet to be known Despite her crime she is a nice and caring girl who rarely talk