diff --git a/core/siren-core-custom.el b/core/siren-core-custom.el
index acc3f43..bcc1725c 100644
--- a/core/siren-core-custom.el
+++ b/core/siren-core-custom.el
@@ -2,20 +2,13 @@
 
 ;;; Commentary:
 
-;; Refinements of the core editing experience in Emacs.
-;;
-;; Shamelessly ripped from Emacs Prelude.
+;; Definition of base siren group.
 
 ;;; Code:
 
 (defgroup siren nil
-  "Basic settings for Siren."
-  :group 'tools)
-
-(defcustom siren-transparency-level 99
-  "The default frame transparency level for Emacs frames."
-  :type 'number
-  :group 'siren)
+    "Basic settings for Siren."
+    :group 'tools)
 
 (provide 'siren-core-custom)
 ;;; siren-core-custom.el ends here
diff --git a/core/siren-core-modules.el b/core/siren-core-modules.el
index 9ba432e..857f637 100644
--- a/core/siren-core-modules.el
+++ b/core/siren-core-modules.el
@@ -16,6 +16,7 @@
 ;; UI
 (require 'siren-pixel-scroll)
 (require 'siren-solaire-mode)
+(require 'siren-transparency)
 
 ;; Core
 (require 'siren-aliases)
diff --git a/core/siren-core-transparency.el b/core/siren-core-transparency.el
deleted file mode 100644
index 4b99c1e..0000000
--- a/core/siren-core-transparency.el
+++ /dev/null
@@ -1,55 +0,0 @@
-;;; siren-core-transparency.el --- jimeh's Emacs Siren: Emacs Frame transparency.
-
-;;; Commentary:
-
-;; Basic helpers and configuration for frame transparency.
-
-;;; Code:
-
-(defun siren-transparency-fix ()
-  "Set initial value of alpha parameter for the current frame."
-  (interactive)
-  (if (equal (frame-parameter nil 'alpha) nil)
-      (set-frame-parameter nil 'alpha 100)))
-
-(defun siren-transparency-increase ()
-  "Increase level of transparency for the current frame."
-  (interactive)
-  (siren-transparency-fix)
-  (if (> (frame-parameter nil 'alpha) 0)
-      (let ((new-level (+ (frame-parameter nil 'alpha) -1)))
-        (set-frame-parameter nil 'alpha new-level)
-        (message "Frame transparency set to %s" new-level))
-    (message "This is a minimum value of transparency!")))
-
-(defun siren-transparency-decrease ()
-  "Decrease level of transparency for the current frame."
-  (interactive)
-  (siren-transparency-fix)
-  (if (< (frame-parameter nil 'alpha) 100)
-      (let ((new-level (+ (frame-parameter nil 'alpha) +1)))
-        (set-frame-parameter nil 'alpha (+ (frame-parameter nil 'alpha) +1))
-        (message "Frame transparency set to %s" new-level))
-    (message "This is a minimum value of transparency!")))
-
-(defun siren-transparency (numb)
-  "Set level of transparency for the current frame by providing NUMB."
-  (interactive "nEnter transparency level in range 0-100: ")
-  (if (> numb 100)
-      (message "Error! The maximum value for transparency is 100!")
-    (if (< numb 0)
-        (message "Error! The minimum value for transparency is 0!")
-      (set-frame-parameter nil 'alpha numb))))
-
-(siren-transparency siren-transparency-level)
-(add-hook 'after-make-frame-functions
-          (lambda (selected-frame)
-            (set-frame-parameter selected-frame 'alpha siren-transparency-level)))
-
-;; Keybindings
-(global-set-key (kbd "C-M-|") 'siren-transparency)
-(global-set-key (kbd "C-M-<") 'siren-transparency-increase)
-(global-set-key (kbd "C-M->") 'siren-transparency-decrease)
-
-(provide 'siren-core-transparency)
-;;; siren-core-transparency.el ends here
diff --git a/core/siren-core-ui.el b/core/siren-core-ui.el
index 790f1e2..6b2298d 100644
--- a/core/siren-core-ui.el
+++ b/core/siren-core-ui.el
@@ -6,8 +6,6 @@
 
 ;;; Code:
 
-(require 'siren-core-transparency)
-
 ;; the toolbar is just a waste of valuable screen estate
 ;; in a tty tool-bar-mode does not properly auto-load, and is
 ;; already disabled anyway
diff --git a/modules/ui/siren-transparency.el b/modules/ui/siren-transparency.el
new file mode 100644
index 0000000..00609bb
--- /dev/null
+++ b/modules/ui/siren-transparency.el
@@ -0,0 +1,56 @@
+;;; siren-transparency.el --- jimeh's Emacs Siren: Emacs Frame transparency.
+
+;;; Commentary:
+
+;; Basic helpers and configuration for frame transparency.
+
+;;; Code:
+
+(require 'siren-ui)
+
+(defgroup siren-transparency nil
+  "Options for the Siren transparency."
+  :group 'siren-ui)
+
+(defcustom siren-transparency-default-level 99
+  "The default frame transparency level for Emacs frames."
+  :type 'number
+  :set (lambda (symbol value)
+         (set-default symbol value)
+         (setf (alist-get 'alpha default-frame-alist) value))
+  :group 'siren)
+
+(defun siren-transparency-decrease ()
+  "Decrease level of transparency for the current frame."
+  (interactive)
+  (let ((current (or (frame-parameter nil 'alpha) 100)))
+    (if (> current 0)
+        (let ((new-level (+ current -1)))
+          (siren-transparency new-level)
+          (message "Frame transparency set to %s" new-level))
+      (message "This is a minimum value of transparency!"))))
+
+(defun siren-transparency-increase ()
+  "Increase level of transparency for the current frame."
+  (interactive)
+  (let ((current (or (frame-parameter nil 'alpha) 100)))
+    (if (< current 100)
+        (let ((new-level (+ current +1)))
+          (siren-transparency new-level)
+          (message "Frame transparency set to %s" new-level))
+      (message "This is a minimum value of transparency!"))))
+
+(defun siren-transparency (num)
+  "Set level of transparency for the current frame by providing NUM."
+  (interactive "nEnter transparency level in range 0-100: ")
+  (set-frame-parameter nil 'alpha (cond ((> num 100) 100)
+                                        ((< num 0) 0)
+                                        (t num))))
+
+;; Keybindings
+(global-set-key (kbd "C-M-|") 'siren-transparency)
+(global-set-key (kbd "C-M-<") 'siren-transparency-decrease)
+(global-set-key (kbd "C-M->") 'siren-transparency-increase)
+
+(provide 'siren-transparency)
+;;; siren-transparency.el ends here
diff --git a/modules/ui/siren-ui.el b/modules/ui/siren-ui.el
new file mode 100644
index 0000000..7b60a59
--- /dev/null
+++ b/modules/ui/siren-ui.el
@@ -0,0 +1,14 @@
+;;; siren-ui.el --- jimeh's Emacs Siren: siren-ui.
+
+;;; Commentary:
+
+;; Basic setup for siren-ui.
+
+;;; Code:
+
+(defgroup siren-ui nil
+  "Options for the Siren UI."
+  :group 'siren)
+
+(provide 'siren-ui)
+;;; siren-ui.el ends here