RDG: Red Data Girl, Nagi no Asu kara Recommendations
Same Director : Shinohara, Toshiya
Both fantasy anime with Drama.
Both story lines are really awesome.
Manaka and Suzuhara both get protection of the main male charachter. Manaka get protection of hikari and Suzuhara get protection of Sagara.
P.A. Works present two series with a similar atmosphere and touch of fantasy by the names of RDG: Red Data Girl and Nagi no Asukara.
Beyond the fantasy, there's also drama and interpersonal relationships going behind the scenes. There are bits of romance, and our main female protagonist becomes the core of it.
Both series take place in a school life environment where every day presents a new challenge. It also focuses the daily lives of our characters that fuses fantasy with doses of slice-of-life.