Examine source code of Before the flower opens.

{
  "theme": {
    "images": {
      "theme_frame": "0120--hanasakumae--11.jpg"
    },
    "colors": {
      "frame": "#f7a6ee",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Before the flower opens.",
  "manifest_version": 2,
  "description": "花ひらく前。"
}