TWILIGHT OF THE DARK MASTER

From the beginning of time, Earth has been enslaved by the powerful and grotesque Ogres. The dominance these arrogant immortals hold over the helpless victims is challenged only by the noble Guardians. Eons later, in the year 2089, few Ogres of Guardians remain in Neo-Shinjuku. Humans rule the Earth; yet, deep within the dark underworld of the city, the supreme Ogre is still alive and is preparing, once again, to enslave the Human race. (Source: Urban Vision) — Description from AniList community (anilist.co).