H02573 See In AO Ep 1

Kyouya is a teacher in Andrude Ocean School, a large city built on the water. He saved Kisaragi Miyu three years ago, and she has secretly loved him since. Her twin sister Yumi, an android made by their late parents, helps Miyu pursue him, but Yumi's own feelings waver. A second story focuses on Kyouya and Yui, the sister of his first love.