With her jet-black hair, sinister smile, and silent demeanor, Sawako "Sadako" Kuronuma always had trouble fitting in during high school. But with help from her friends, her boyfriend Kazehaya, and even her rival-turned-friend Kurumi, Sawako came out of her shell. Now in college, Sawako and Kurumi have become incredibly close, but Kurumi longs for a romance of her own.

In college, Kurumi thinks she's found her soulmate in Sawako, her rival-turned-best-friend from high school. After Kurumi survives a frightening encounter with a stalker, Sawako's cousin Eiji supports her in just the ways she needs--he even stays the night at Kurumi's place. When morning comes, Kurumi doesn't want him to leave. Has she gone from fiercely independent to desperately needy?