I thought the weirdest thing I'd read was this oneshot, and then I saw the comment of someone wanting MC to be a massive cuckhold who falls in love with people at the drop of a hat.
Technically speaking, she can't be a cuckold. Masculine-only term. You're thinking of a cuckquean.
However, a manga solely about a girl seeking a "pure yuri" relationship, repeatedly getting rejected for all manner of different other options, sounds utterly hilarious.