An Agent of a Certain Marvel

In the year 2000, Mark stood alone before the floor-to-ceiling window of his apartment atop the Star Tower in Manhattan, holding a glass of bourbon whiskey, celebrating his thirtieth birthday!He had a younger brother who led himself astray, a sister who had aspired to be a nun since childhood but ended up becoming a star, and another younger sister who had just awakened her chuuni talent, clamoring for peace with ordinary humans.He had a car, a house, and his career had reached its peak, as the Supervisory Special Agent of the New York Office of the Federal Bureau of Investigation.By all rights, Mark should have been very satisfied with this life.But, there was a problem!This place——Is the Marvel Universe！！！！！！