diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe0908a..bdf0fc5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ Record of the modification in project development.
 ### Changed
 - [Issue 25 : Refactoring: Sourcing config.sys is not needed in the chrooted_job](https://github.com/suikan4github/kaiten-yaki/issues/25)
 - [Issue 26 : Update AN01 for btrfs](https://github.com/suikan4github/kaiten-yaki/issues/26)
+- [Issue 27 : Eliminates the confirmation dialog](https://github.com/suikan4github/kaiten-yaki/issues/27)
 
 ### Deprecated
 ### Removed
diff --git a/INSTALL.md b/INSTALL.md
index b0b01bd..991dc4c 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -142,7 +142,7 @@ In the case of Void Linux
 ```bash
 source void-kaiten-yaki.sh
 ```
-After several interactive confirmations, Kaiten-yaki will ask you to input a passphrase. This passphrase will be applied to the encryption of the LUKS volume. Make sure you use identical passphrases between all installations of the distributions in a computer. Otherwise, the install process terminates with an error, except the first distribution installation.  
+After printing the configuration parameters, Kaiten-yaki will ask you to input a passphrase. This passphrase will be applied to the encryption of the LUKS volume. Make sure you use identical passphrases between all installations of the distributions in a computer. Otherwise, the install process terminates with an error, except the first distribution installation.  
 
 ## Second stage : GUI/TUI installer
 After the first script finishes, the GUI/TUI installer starts automatically. Configure it as usual and run it. Ensure you map the following correctly.
diff --git a/script/lib/common.sh b/script/lib/common.sh
index ed5be7d..6e4c6ea 100644
--- a/script/lib/common.sh
+++ b/script/lib/common.sh
@@ -57,46 +57,22 @@ function confirmation(){
 	# For surre ask the your config.sh is edited
 	cat <<- HEREDOC
 
-	The destination logical volume label is "${LVROOTNAME}"
-	"${LVROOTNAME}" uses ${LVROOTSIZE} of the LVM volume group.
-	Are you sure to install? [Y/N]
+	LUKS volume partition : ${DEV}${CRYPTPARTITION} 
+	LUKS volume name      : "${CRYPTPARTNAME}" 
+	Volume group name     : "${VGNAME}"
+	Root volume name      : "${VGNAME}-${LVROOTNAME}"
+	Swap volume name      : "${VGNAME}-${LVSWAPNAME}"
+	Size of "${VGNAME}-${LVROOTNAME}" : ${LVROOTSIZE}
 	HEREDOC
-	read -r YESNO
-	if [ "${YESNO}" != "Y" ] && [ "${YESNO}" != "y" ] ; then
-		cat <<- HEREDOC 
 
-		...Installation process terminated..
-		HEREDOC
-		return 1 # with error status
-	fi	# if YES
-
-	# For sure ask to erase. 
 	if [ "${ERASEALL}" -ne 0 ] ; then
-		echo "Are you sure you want to erase entire \"${DEV}\"? [Y/N]"
-		read -r YESNO
-		if [ "${YESNO}" != "Y" ] && [ "${YESNO}" != "y" ] ; then
-			cat <<-HEREDOC 
-		...Check your config.sh. The variable ERASEALL is ${ERASEALL}.
+		echo "Going to erase entire disk ${DEV}."
+	elif [ "${OVERWRITEINSTALL}" -ne 0 ] ; then
+		echo "Going to overwrite the logical volume \"${VGNAME}-${LVROOTNAME}\"."
+	else
+		echo "Going to create a new logical volume \"${VGNAME}-${LVROOTNAME}\"."
+	fi
 
-		...Installation process terminated..
-		HEREDOC
-		return 1 # with error status
-		fi	# if YES
-	fi	# if erase all
-
-	# For sure ask to overwrite. 
-	if [ "${OVERWRITEINSTALL}" -ne 0 ] ; then
-		echo "Are you sure you want to overwrite \"${LVROOTNAME}\" in \"${VGNAME}\"? [Y/N]"
-		read -r YESNO
-		if [ "${YESNO}" != "Y" ] && [ "${YESNO}" != "y" ] ; then
-			cat <<-HEREDOC 
-		...Check your config.sh. The variable OVERWRITEINSTALL is ${OVERWRITEINSTALL}.
-
-		...Installation process terminated..
-		HEREDOC
-		return 1 # with error status
-		fi	# if YES
-	fi	# if overwrite
 
 	# ----- Set Passphrase -----
 	# Input passphrase