In the world of superheroes, perhaps none is more well-known than Fubuki: The Hellish Blizzard. A talented psychic, Fubuki is the top hero of the B-Class, with an ever-expanding group of heroes working under her. After witnessing the power of Saitama, a C-ranked hero who can obliterate monsters in one punch, she immediately tried to pressure him into joining her Blizzard Group.

One day, while coming to his apartment to try and persuade him to become her underling, Fubuki noticed that Saitama was sleeping. Upset at his ragged posture, she quickly whipped off the blanket covering him. However, what she saw under the blanket was...