Endless Summer (Kokichi Ouma x Reader)

[Cover Credit: lemontea on Pixiv]
(Originally from Archive of Our Own)

You woke up in the seat of an airplane, eyes scanning the others sat around somewhere around you. You remembered that the school had picked you to go on a trip to the island of La Violeta with 16 other students from different schools. It was the beginning of the sun, beaming with its lavish heat and, yet, the beginning of an unending summer, little did you know.

Brief Note: To make the (female) main character's name easier to read she will be known as 'Ria Okumura' instead of just (Y/N).