He was planning to meet Robin and Seojun there for breakfast. However, Robin had mentioned he might not make it, as he could still be sleeping at this hour. If that happened, Robin told them to go ahead and eat without him.
Haneul had offered to wake Robin up, pointing out that it wouldn't be a problem. Unlike their stay at the hotel, where they had shared a room with two or more people, he could easily head over to cabin number six and knock on the door. However, Robin had declined, insisting it wasn't necessary. He didn't want to trouble Haneul and joked that it might become a habit if he relied on him to wake him up. Besides, with this kind of competition, Robin reasoned, it was better to learn to wake up early on his own.