diff --git a/dlibrary/dlibrary.py b/dlibrary/dlibrary.py
index b651134..de0279e 100755
--- a/dlibrary/dlibrary.py
+++ b/dlibrary/dlibrary.py
@@ -28,6 +28,7 @@ FANZA_ID_REGEX = re.compile('^d_[0-9]+$')
 FAKKU_ID_REGEX = re.compile('.*_FAKKU$')
 
 HI_RES_REGEX = re.compile('高解像度', re.IGNORECASE)
+NO_TONE_REGEX = re.compile('トーン.*[な無]し|グレースケール')
 
 TEXTLESS_REGEX = re.compile('(台詞|セリフ|せりふ|テキスト|文字)((な|無)し|抜き)|notext|textless', re.IGNORECASE)
 FRONT_COVER_REGEX = re.compile('(^|[^裏])表紙|cover|hyoushi', re.IGNORECASE)
@@ -555,12 +556,12 @@ def collate_from_paths(srcs, dest, start_index, exclude):
         return 0
 
     if len(srcs) == 2 and all(src.is_dir() for src in srcs):
-        hi_res_dirs = [src for src in srcs if HI_RES_REGEX.search(nname(src))]
-        if len(hi_res_dirs) == 1:
-            hi_res_dir = hi_res_dirs[0]
-            lo_res_dir = next(src for src in srcs if src != hi_res_dir)
-            if len(descendant_files_ignore(lo_res_dir, exclude)) == len(descendant_files_ignore(hi_res_dir, exclude)):
-                return collate_from_paths([hi_res_dir], dest, start_index, exclude)
+        better_version_dirs = [src for src in srcs if HI_RES_REGEX.search(nname(src)) or NO_TONE_REGEX.search(nname(src))]
+        if len(better_version_dirs) == 1:
+            better_version_dir = better_version_dirs[0]
+            worse_version_dir = next(src for src in srcs if src != better_version_dir)
+            if len(descendant_files_ignore(worse_version_dir, exclude)) == len(descendant_files_ignore(better_version_dir, exclude)):
+                return collate_from_paths([better_version_dir], dest, start_index, exclude)
 
     images_vs_pdf = try_collate_images_vs_pdf(srcs, dest, start_index, exclude)
     if images_vs_pdf != False: