hang together

verb6

1. •
   To be connected.
2. •
   To correspond or fit well.
3. •
   To be self-consistent and make sense; to seem plausible.

   • The story does not hang together.
4. •
   To be united in defiance.
5. •
   To remain united; to stand by one another.

   • […]we are all of a piece; we hang together. — 1681
6. •
   To be in a romantic relationship.