Translator and typesetter of chapter 1-4 here.
I don't know who made these, but you have my blessings to continue the series. (I no longer have the time to release consistently)
Would be nice if you can improve on the typesetting more, and include a "support the author by checking out Back Street Girls" on the last page next time.
Also heads up, the Italian scanlation team on Dex might use your translation for their own Italian version of the manga.