Taimanin Asagi 2

Story

Based on the erotic game by Black Lilith & Anime Lilith. One year has passed since the Chaos Arena was destroyed, Asagi and Sakura were presently on an abandoned street on a man-made island that floated on top of Tokyo Bay. It was an enormous box-shaped island built by the government and referred to as "Tokyo Kingdom." There was hope that it would become a second city center floating at sea, but it had failed to attract businesses. The only way of getting to and from the island was through Honshu Island over the 10 kilometer Tokyo Kingdom bridge.

Synopsis via AniList (English).