Prerequisites: Max out Ottmar's level 1 friendship
Reward: None
Unlocks: Ottmar level 2 friendship
As with every friendship quest, you must first make nice with Ottmar before you can advance your relationship with him. Ottmar works at the Primerose Sail, and can typically be found either in the store or working out on the docks. He also manages Ottmar's Cafe from time to time, and in the evenings will usually head down to the Tavern.
Once you've maxed out the first level of friendship with Ottmar you'll find a message from him on the Bulletin Board in Town Square. He wants someone to fetch a few items for him, and asks that you drop by the Primerose Sail between 10:00 and 18:00, Monday to Sunday. Step inside the Primerose Sail to trigger the cut scene.
Ottmar is busy being scolded by Leano for leaving the store untended, and can't leave his post. He wants you to go to the Farmhouse in his stead and pick up some of his beloved Corn. You'll find the Farmhouse northeast of the Town Square, and Lucke, standing at the counter, will give you a Premium Bag of Corn.
Track down Ottmar - likely back at the Primerose Sail, though he does move around from time to time - and give him the Corn to end the quest. This will boost your friendship level with Ottmar to the second tier.