アビスアジュールの罪人 [Abyss Azure no Zainin] #1

Two mermaids — one with striking red hair, the other smaller and pale-haired, clinging close — drift through the dim, aqueous depths in this opening volume from Kadokawa. The title A Sinner of the Deep Sea sets a quietly ominous tone that the cover's muted blues and greens carry beautifully, hinting at secrets buried far below the surface. A compelling start to what looks like an atmospheric underwater fantasy manga.