Ah gawd, if it turn into this kind of plot development.. There will be a long long journey before DC ends
Let see...
1. Sonoko would've need some chapter to conclude her pairing with Makoto
2. Yumi would also need some (unless she's going to be paired with Chiba)
3. That Waitress (forgot her name) who show up frequently would also need a pairing
4. Agasa might got into meeting again with Fusae
5. Hideo and/or Higo ? Seems plausible.. They kept showing up now and then anyway...
6. Yoko Okino, maybe with some random guy
7. Rena, who knows she might be paired with Gin / Vodka, or maybe with Eisuke him self

8. Eisuke for obvious reason..
9. Jodie
10. Akai / Scar Akai / Okiya (?)
11. Dr.Araide
12. Vermouth / Sharon / Chris
and the list would still go on..