Tasogare-iro no Uta Tsukai

A girl lives alone, content with her independence, but seeks to learn Chanting Skills (Meieishiki) to summon her "heart," hoping to connect with someone important. The process involves using colored catalysts—red, blue, yellow, green, and white—to invoke specific chants. She studies at a vocational school where these techniques are taught. A transfer student named Neight, who uses unconventional Night Colour chanting, draws her attention. Meanwhile, a renowned Rainbow User named Xins is also searching for a Night Colour practitioner.