With summer vacation coming to an end, Nagi is saddened that there won't be any more free time to spend with Hayate. After reading a manga, Nagi decides to take Hayate fishing. As they reached the Sanzenin Lake, Nagi was ready to go fly fishing, but Hayate told her it’s challenging. While Hayate and Nagi are having a romantic time fishing (in Nagi's mind) on a boat, the lord of the lake overturns their boat. Both of them saw Maria with the lord from before, in which she was able to catch it...