Blood Friends (2022)

Blood Friends 2022 / 血ぃともだち 2022 / Chi Itomodachi

The film centers on Maki, Hitoko, Kaoru, and Nami, four girls who are part of their school's ‟blood donation club‟ who all enjoy having their blood drawn. One day, Maki meets Mai, a beautiful girl dressed in black, in the blood donation room. Maki unconsciously carries Mai into the blood donation club room after she fainted. When she woke up, Mai mentions that she couldn't attack humans and that she’s a fallen vampire. The four resolve to donate their blood for Mai's sake. (Source: Official Website of this film, AnimeNewsNetwork)