Shiosai

 is the 11th digital single released by NELN. It was released on February 27, 2021.

Tracklist

 * 1) Shiosai (しおさい; Sea Roar)

Featured Members

 * Natsumi
 * Karin
 * Akari
 * Mao

Trivia

 * Unlike NELN's previous music videos, directed by creative producer Chiori Morioka, Shiosai was filmed collectively by the members and edited by MAO.
 * Several of the scenes in the music video are filmed on the artificial island, Odaiba, in Tokyo Bay.