I think something might be wrong.
I tried completing the quest, but its stuck at 80%.
I've run both 1-2 and 1-4 three times each, getting S-Ranks each time.
I got 50% after I did 1-2 twice, then 80% after beating 1-4 once. But after that, nothing works.
My current fleet composition is:
Tenryuu, Yuudachi, Murasame, Shimakaze, Isokaze and Yukikaze.
(Small note: The original fleet was Sendai, Kisaragi, Mutsuki, Z1, Z2 and Yukikaze - buy changed some DDs out, then the CL, after they got damaged and fatigued)
Edit: Hm, wait. Do we need 1-3 as well?
I'm using Poi and it might have the wrong info in that case...