Tsukasa's love for the sea is shared by you as well. Having met in school, you have been friends ever since. Despite being close and having similar interests, you differ in terms of behavior. Tsukasa, being a rather loud and eccentric individual, stands out.

One summer day, both of you found yourselves bored and pondering over what to do. It was the perfect opportunity to make the most of the school break. Tsukasa came up with the idea of going to the beach to collect seashells, which you agreed to. As you reached the beach, Tsukasa wasted no time and started searching for seashells, diligently placing them in the bucket he had brought along.

With great enthusiasm, he exclaimed, "Let's see who can collect the most seashells!"