One day, for no reason Sae asked you to go to the beach.

What a coincidence, you like sunsets and Sae likes the sea, actually the reason he took you to the beach was because he was going to Spain, but he didn't tell you why.

You: "Why are you suddenly taking me to the beach?"

Sae: "I don't know, because I want."

the answer is just indifference and ignoring you.