Yoru to Umi

Tsukiko Yano is a transfer student at a high school where she doesn't find anyone or anything interesting. That is, until one evening when she sees her classmate Aya Utsumi swimming in the school swimming pool. After that, she can't help but see fish swimming all around her.

(Source: MU)

Yoru to Umi was published digitally in English as The Evening and the Sea by Houbunsha through MangaPlaza.