Add following as a related_name for followers.

fedireads/incoming.py

@@ -187,7 +187,7 @@ def get_following(request, username):
         return HttpResponseBadRequest()
 
     user = models.User.objects.get(localname=username)
-    following = models.User.objects.filter(followers=user)
+    following = user.following
     page = request.GET.get('page')
     return JsonResponse(activitypub.get_following(user, page, following))
 

fedireads/migrations/0008_auto_20200224_1504.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.0.3 on 2020-02-24 15:04
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('fedireads', '0007_auto_20200223_0902'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='user',
+            name='followers',
+            field=models.ManyToManyField(related_name='following', through='fedireads.UserRelationship', to=settings.AUTH_USER_MODEL),
+        ),
+    ]

fedireads/models/user.py

@@ -38,7 +38,8 @@ class User(AbstractUser):
         'self',
         symmetrical=False,
         through='UserRelationship',
-        through_fields=('user_subject', 'user_object')
+        through_fields=('user_subject', 'user_object'),
+        related_name='following'
     )
     favorites = models.ManyToManyField(
         'Status',