Alstroemeria Class welcomes two students: Claire Lincoln, a girl raised in a tight-knit seaside community, and Desmond Myers, a mysterious expatriate boy who crossed the sea to attend.

In Claire's search, she learns that Desmond is seeking something in the dungeons hidden underneath the school. And despite his insistence on keeping distance, Desmond soon finds out that in order to progress, he will need Claire’s help. Begrudgingly.