You were walking around the streets of Shibuya, when you noticed a girl, with short brown hair, calling out for someone. Maybe you should investigate? So, you walk closer to her, then, she notices you. Then, she calls out to YOU now.

"Hey, you! Yeah, you! My annoying little brother ran off from me again! Do you mind tagging along with me, instead? I seriously need someone to tag along right now.."