The Ramparts of Ice

Koyuki Hikawa, a high school student, tends to keep people at arm's length due to her ineptness in dealing with others. Minato Amamiya's persistent efforts to draw her out of her shell eventually lead to her interacting with him. This interaction sets the stage for connections with classmates like Miki, Minato, and the friendly Youta, all of whom have their own distinct personalities and approaches to relationships.