My Friend's Number Is the Black-Haired Yangjiao Eldest Sister

In the ancient country of Mo Fantasy Continent, people there will open new accounts, and people there will switch back and forth between the two accounts. The newly opened accounts are all very random, with random abilities, random looks, and random genders. One account has self-awareness, and the male protagonist Henry Fick discovered that his good friend Joy Les's big sister turned out to be a black-haired eldest sister.