diff --git a/keyboards/handwired/hillside/48/keymaps/manna-harbour_miryoku/config.h b/keyboards/handwired/hillside/48/keymaps/manna-harbour_miryoku/config.h
new file mode 100644
index 0000000000..e779de8a99
--- /dev/null
+++ b/keyboards/handwired/hillside/48/keymaps/manna-harbour_miryoku/config.h
@@ -0,0 +1,38 @@
+// Copyright 2022 Davide Masserut (@mssdvd)
+// Copyright 2019 Manna Harbour
+// https://github.com/manna-harbour/miryoku
+
+// This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+#pragma once
+
+#define XXX KC_NO
+
+// clang-format off
+#if defined MIRYOKU_MAPPING_EXTENDED_THUMBS
+#define LAYOUT_miryoku( \
+     K00, K01, K02, K03, K04,                          K05, K06, K07, K08, K09, \
+     K10, K11, K12, K13, K14,                          K15, K16, K17, K18, K19, \
+     K20, K21, K22, K23, K24,                          K25, K26, K27, K28, K29, \
+     N30, N31, K32, K33, K34,                          K35, K36, K37, N38, N39 \
+) \
+LAYOUT( \
+XXX, K00, K01, K02, K03, K04,                K05, K06, K07, K08, K09, XXX, \
+XXX, K10, K11, K12, K13, K14,                K15, K16, K17, K18, K19, XXX, \
+XXX, K20, K21, K22, K23, K24, XXX,      XXX, K25, K26, K27, K28, K29, XXX, \
+          XXX, XXX, K32, K33, K34,      K35, K36, K37, XXX, XXX \
+)
+#else
+#define LAYOUT_miryoku( \
+     K00, K01, K02, K03, K04,                          K05, K06, K07, K08, K09, \
+     K10, K11, K12, K13, K14,                          K15, K16, K17, K18, K19, \
+     K20, K21, K22, K23, K24,                          K25, K26, K27, K28, K29, \
+     N30, N31, K32, K33, K34,                          K35, K36, K37, N38, N39 \
+) \
+LAYOUT( \
+XXX, K00, K01, K02, K03, K04,                K05, K06, K07, K08, K09, XXX, \
+XXX, K10, K11, K12, K13, K14,                K15, K16, K17, K18, K19, XXX, \
+XXX, K20, K21, K22, K23, K24, XXX,      XXX, K25, K26, K27, K28, K29, XXX, \
+          XXX, K32, K33, K34, XXX,      XXX, K35, K36, K37, XXX \
+)
+#endif
diff --git a/keyboards/handwired/hillside/48/keymaps/manna-harbour_miryoku/keymap.c b/keyboards/handwired/hillside/48/keymaps/manna-harbour_miryoku/keymap.c
new file mode 100644
index 0000000000..dbab7f9820
--- /dev/null
+++ b/keyboards/handwired/hillside/48/keymaps/manna-harbour_miryoku/keymap.c
@@ -0,0 +1,4 @@
+// Copyright 2019 Manna Harbour
+// https://github.com/manna-harbour/miryoku
+
+// This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.