THE SECRETS OF DUVAL

Could be started even right after getting back to the forest from the mountains, right after “Rasmus’s trial”, it just was implemented properly in 0.31 though. To start it, visit Kin and “ask about their kind” to learn about Flo and Ebb possibly being brothers, then you can “ask about their names” to either Ebb or Flo, both will ask you not to tell the other you know about the names meaning something, the game does warn you before choosing; when you are sure, promise and enter the bathhouse at least 3 days later to find Ebb very worried, as Flo is nowhere to be found. For both routes, you can ask the people in the tavern (not just inside, outside and barn included, but Parif and Meko excluded) if they saw the shark; Hakan points you to Snow, Snow to Chet, and both Chet and Nauxus (if he is alive, next to the barn at night, but not while he is in his hut during the day) will tell you he went towards the lake, while the others don’t know anything. Still, you can immediately go check the cabin, no asking needed. At this point, the path splits:

• you promised Ebb: after checking the hut for Flo in vain, you meet Ebb outside, but neither of you know where else to look, so he has you come along to the lake, where he performs the ritual to ask for god Sui’s intervention, but he gets no response. The rest is interesting lore about them and what happened, slightly more focused on Ebb (watching him perform the ritual or looking the other way just adds one line of text). Witer eventually finds you, saying that Ebb is back, and this first part ends, not knowing what Ebb did or where he went.
• you promised Flo: when you get out of the cabin, you stumble upon Flo arriving instead of Ebb, and he invites you inside to show you an ingot of a rare metal he “borrowed” from his family to find a blacksmith who can forge him a wakizashi for self-defense, he also shows disgust and starts telling you about him and Ebb. For now, he is going to hide and wait here for news; at this point, you can immediately lie and say you didn’t find anyone, ask the bull shopkeeper and tell he can’t work that anyway, or actually succeed by asking Kith (but not Kin, so before 18:00) and leave the ingot to him, then go make Flo a happy fish. After that, the shark will tell you more about their story, showing us how he really feels about the situation and Ebb (regardless of what you did). The orca finds you two, and you all both head back to the tavern.
  The reward is always one level up point, and the quest will surely continue, nothing yet as of 0.34.
  Note: if you just came back after “the great molescape” and the mysterious wolf attacks you, see the bull kitchen route in the quest above for the battle analysis (and AGI checks info).