Sagittarius women are neat
Each one loves to look after and fuss about the person they love, which will go far in making life intolerable for both of them. Libra finds Virgo fussy, critical, and completely inflexible.
Together these signs do a lot of talking about things that need doing; each one needs to be paired with a positive personality for anything but talking to be accomplished. Stay-at-home Virgo resents Libra's social butterfly instincts and the pursuit of pleasure. Virgo can also be a grumbling and tiresome person with dictatorial propensity.
The more helpless he appears to be, the more appealing he will be to the Virgo woman who is looking for a fix it up project.
The only problem would be if it degenerates into Virgo criticizing Pisces endlessly.
The Virgo woman may need to help the Pisces man focus to advance this courtship.