To be honest, in original story. In the original 'One Punch Man' manga and anime, Fubuki, a.k.a. Blizzard of Hell, simply does not act as if she were in love of Saitama. Even so, she acknowledges his strength whole-heartedly and at one point tries in vain to recruit him into her B-Class type Alliance ship.--Blizzard of Amazing Snow She views Saitama as a step that will enable her to break into the A-Class hero rankings sooner and look forward to life as an adulteress but not as someone with whom she wants a boyfriend girlfriend relationship. Since it is so in genre conventions, and also because of the true love between two people, "anything goes" is the cry in fannon and ship with no limits at all becomes reality. Fans make up their own romantic scenarios ad nauseam.