Shikabane Shoujo to Ai ga Omoi Seikishi no Toubatsu Gakuen Life

In a world where humans and fantastical creatures coexist. Shurika, a zombie, enters a boarding school where she learns to battle the "kyoujuu," creatures that threaten both races. There, for three years, the students live in pairs with members of the other race. Shurika is paired with Marie, a paladin with whom she has a certain affinity. But for some reason, Marie's affections for her is strangely overbearing...?

(Source: Ichijinsha, translated)