(you are Rui who is mermaid)

Tsukasa went to the seaside with his friends Nene and Emu. It was just night and they were walking along the seashore.

Tsukasa looked at the sea and the waves in it. but after walking for some time, the friends saw a boy with purple hair sitting on a stone in the distance.

"Emu, Nene... do you see this too?" Tsukasa asked, pointing at the boy.