Kaijuu Iro no Shima

Vol.1 Chapter 4: Kon and Furuka's Colors (4)
Vol.1 Chapter 3: Kon and Furuka's Colors (3)
Vol.1 Chapter 5: Kon and Furuka's Colors (5)
Vol.1 Chapter 3: Kon and Furuka's Colors (3)
Vol.1 Chapter 5: Kon and Furuka's Colors (5)
Without a single friend, middle schooler Chigawa Kon lives on a small island and laments that she hasn't "fallen in love" yet, unlike her classmates. She often plays by "the Hole", a cave near the sea where a man-eating monster lives, according to folk tales. One day, as she meets with another girl who accidentally drops her smartphone in the sea, they fall from a cliff together but miraculously survive. It turns out Furuka is also all alone.