diff --git a/gimuserver/gme/GmeController_Handlers.cpp b/gimuserver/gme/GmeController_Handlers.cpp
index b9acaef..e4c4b59 100644
--- a/gimuserver/gme/GmeController_Handlers.cpp
+++ b/gimuserver/gme/GmeController_Handlers.cpp
@@ -6,6 +6,7 @@
 #include "handlers/BadgeInfoHandler.hpp"
 #include "handlers/ControlCenterEnterHandler.hpp"
 #include "handlers/UpdateInfoLightHandler.hpp"
+#include "handlers/GatchaActionHandler.hpp"
 #include "handlers/GatchaListHandler.hpp"
 #include "handlers/DeckEditHandler.hpp"
 #include "handlers/MissionStartHandler.hpp"
@@ -21,6 +22,7 @@ void GmeController::InitializeHandlers()
 	REGISTER(BadgeInfo);
 	REGISTER(ControlCenterEnter);
 	REGISTER(UpdateInfoLight);
+	REGISTER(GatchaAction);
 	REGISTER(GatchaList);
 	REGISTER(DeckEdit);
 	REGISTER(MissionStart);
diff --git a/gimuserver/gme/handlers/GatchaActionHandler.cpp b/gimuserver/gme/handlers/GatchaActionHandler.cpp
new file mode 100644
index 0000000..8f4949f
--- /dev/null
+++ b/gimuserver/gme/handlers/GatchaActionHandler.cpp
@@ -0,0 +1,72 @@
+#include "GatchaActionHandler.hpp"
+#include "gme/response/SignalKey.hpp"
+#include "gme/response/UserUnitInfo.hpp"
+#include "core/System.hpp"
+
+void Handler::GatchaActionHandler::Handle(UserInfo& user, DrogonCallback cb, const Json::Value& req) const
+{
+    Json::Value res;
+
+    /*
+        req = {
+            "1IR86sAv" : [
+                {
+                    "324b023k" : "1",           if we used summoning ticket ?
+                    "7Ffmi96v" : "17160",       gatcha id
+                    "a329kbl8" : "1"            idx of gatcha request ?
+                }
+            ],
+            ...
+        }
+    */
+
+	// For now, hard-code the response to return unit
+    Response::UserUnitInfo unitInfo;
+
+    // Only add to user unit collection
+    unitInfo.overwrite = false;
+    if (unitInfo.Mst.empty()) {
+        Response::UserUnitInfo::Data d;
+        d.userID = user.info.userID;
+        d.userUnitID = 9999;                   // ensure that this is unique
+        d.unitID = 50256;           
+        d.unitTypeID = 1;
+        d.element = "light";
+        d.unitLv = 1;
+        d.newFlg = 1;
+        d.receiveDate = 100;
+        d.FeBP = 100;
+        d.FeMaxUsableBP = 200;
+        d.baseHp = 5000;
+        d.baseAtk = 1000;
+        d.baseDef = 1000;
+        d.baseHeal = 1000;
+        d.addHp = 100;
+        d.addAtk = 100;
+        d.addDef = 100;
+        d.addHeal = 100;
+        d.extHp = 100;
+        d.extAtk = 100;
+        d.extDef = 100;
+        d.extHeal = 100;
+        d.limitOverHP = 200;
+        d.limitOverAtk = 200;
+        d.limitOverDef = 200;
+        d.limitOverHeal = 200;
+        d.exp = 1;
+        d.totalExp = 100;
+        unitInfo.Mst.emplace_back(d);
+    }
+    unitInfo.Serialize(res);
+
+    // Hard-coded response for OpeUserUnitResponse
+    {
+		Json::Value d;
+		d["edy7fq3L"] = "9999";    // userUnitID to open -> should match the one that was just added
+		d["u0vkt9yH"] = 13762;     // Which summon gate picture to use
+        //d["g30VnzQh"] = ?;       // In IDA this is parsed as GatchaChangeRateInfo, so maybe its for specific banners?
+		res["Km35HAXv"] = d;
+    }
+
+	cb(newGmeOkResponse(GetGroupId(), GetAesKey(), res));
+}
diff --git a/gimuserver/gme/handlers/GatchaActionHandler.hpp b/gimuserver/gme/handlers/GatchaActionHandler.hpp
new file mode 100644
index 0000000..e2e46b0
--- /dev/null
+++ b/gimuserver/gme/handlers/GatchaActionHandler.hpp
@@ -0,0 +1,13 @@
+#pragma once
+
+#include "../GmeHandler.hpp"
+
+HANDLER_NS_BEGIN
+class GatchaActionHandler : public HandlerBase
+{
+public:
+	const char* GetGroupId() const override { return "F7JvPk5H"; }
+	const char* GetAesKey() const override { return "bL9fipzaSy7xN2w1"; }
+	void Handle(UserInfo& user, DrogonCallback cb, const Json::Value& req) const override;
+};
+HANDLER_NS_END
diff --git a/gimuserver/gme/response/UserUnitInfo.hpp b/gimuserver/gme/response/UserUnitInfo.hpp
index 178b22f..845eb9d 100644
--- a/gimuserver/gme/response/UserUnitInfo.hpp
+++ b/gimuserver/gme/response/UserUnitInfo.hpp
@@ -89,10 +89,15 @@ struct UserUnitInfo : public IResponse
 		}
 	};
 
-	const char* getGroupName() const override { return "4ceMWH6k"; }
+	const char* getGroupName() const override {
+		if (overwrite) return "4ceMWH6k";	// Overwrite all units ?
+		return "qC2tJs4E";					// Add to existing units ?
+	}
 
 	std::vector<Data> Mst;
 
+	bool overwrite = true;
+
 protected:
 	size_t getRespCount() const override { return Mst.size(); }