A Swan for the Cat, Gold for the Firefly

Art teacher Hase Hotaru is confounded by one of her students, Nekome Yuna. Yuna fell in love at first sight with Shiratori Ako, a contract teacher at the same school, and she cannot do anything but pursue her. However, Ako has a quirk, the depths of which are yet unknown. A student hopelessly in love and the adults around her being yanked around. (Source: Kadokawa, translated)