A Black-Haired Boy from Another World

That day, an unintentional attack was his first encounter with her. It was that day that she secretly made a wish, but he had no idea about it. As time goes by. Their relationship is getting better and better, but her heart is getting more and more uneasy. Is something bad going to happen? Thinking of this, she started to contact him using the contact information he gave her, but... Ten seconds passed... And there was no reply. The second time... Still nothing.... She tried a third time tremblingly, and said again: Yi, where are you? I miss you so much and want to see you...