diff --git a/rpc/rpc.go b/rpc/rpc.go
index fa6090a..3bcff82 100644
--- a/rpc/rpc.go
+++ b/rpc/rpc.go
@@ -151,14 +151,14 @@ func (re *rpcEngine) loop(ctx context.Context, redisClient *redis.Client, chanNa
 
 var errNoReceiver = errors.New("no receiver")
 
-type callContext struct {
+type CallContext struct {
 	r Receiver
 	t primitive.ObjectID
 }
 
 var ErrCanExecuteHere = errors.New("go ahead")
 
-func (c callContext) call(args ...any) error {
+func (c *CallContext) Call(args ...any) error {
 	if c.r.TargetExists(c.t) {
 		// 여기 있네?
 		return ErrCanExecuteHere
@@ -184,12 +184,15 @@ func (c callContext) call(args ...any) error {
 	return engine.publish(serialized)
 }
 
-func CallOrGo(r Receiver, target primitive.ObjectID, args ...any) error {
-	cc := callContext{
+func Make(r Receiver) *CallContext {
+	return &CallContext{
 		r: r,
-		t: target,
 	}
-	return cc.call(args...)
+}
+
+func (cc *CallContext) To(target primitive.ObjectID) *CallContext {
+	cc.t = target
+	return cc
 }
 
 func encode(target primitive.ObjectID, receiver string, funcname string, args ...any) ([]byte, error) {
diff --git a/rpc/rpc_test.go b/rpc/rpc_test.go
index 59479c8..ccc3071 100644
--- a/rpc/rpc_test.go
+++ b/rpc/rpc_test.go
@@ -22,7 +22,7 @@ func (tr *testReceiver) TargetExists(tid primitive.ObjectID) bool {
 func (tr *testReceiver) TestFunc(a string, b string, c int) {
 	target := primitive.NewObjectID()
 	target[0] = byte(rand.Intn(2) * 20)
-	if CallOrGo(tr, target, a, b) != ErrCanExecuteHere {
+	if Make(tr).To(target).Call(a, b, c) != ErrCanExecuteHere {
 		return
 	}