Otome Game no Hametsu Flag shika Nai Akuyaku Reijou ni Tensei shiteshimatta... OVA

Before they met Catarina Claes, each of her close friends struggled with their personal conflicts. But with a bright smile and a helping hand, the warmth of Catarina's friendship began to melt away the moments of their lonesome darkness.

Plot summary from MyAnimeList. Data and images via Jikan API.