Story1.cs

using System.Collections;
using UnityEngine;

public class Story1 : MonoBehaviour 
{
	[SerializeField]UnityEngine.UI.Text textbox;

	IEnumerator Start () 
	{
		textbox.text = "衝撃のファーストブリット";
		yield return new WaitUntil(()=>Input.GetMouseButtonDown(0));
		yield return null;

		textbox.text = "撃滅のセカンドブリット";
		yield return new WaitUntil(()=>Input.GetMouseButtonDown(0));
		yield return null;

		textbox.text = "抹殺のラストブリット";
	}
}