SOUL LAND 4: ULTIMATE FIGHTING

The Douluo federal expedition team found an egg with golden and silver patterns in the Northernmost Land. After detecting, they found signs of life inside. They quickly brought it back to their Institute for incubation. The egg hatched and a human baby came out; at the same time, the Federal Academy of Sciences was unfreezing a silver-haired woman, and a blue-haired young man was found on the waterfront.(Source: Webnovel) — Description from AniList community (anilist.co).