Scales of Justice is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

The 12 Zodiac Judges, transformed into human form, use the divine scales known as ‘Heavenly Balance’ to measure the weight of the victim’s suffering, ‘Red Pain,’ against the perpetrator’s anguish, ‘Black Pain.’ Based on this measurement, they deliver an appropriate punishment. “The scales must be true, and the weight of crime and punishment must be equal.” Following heaven’s decree, the 12 Zodiac Judges punish human sins in this fantasy human drama about ‘Crime and Punishment’!