diff --git a/CHANGELOG.md b/CHANGELOG.md
index bbf96c9..2608d6d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@
 * refactor: rename the term 'large' to 'basic'
 * cleanup: Basic classes do not require soft and hard limits
 * cleanup: orderBy should be non-empty-array
+* feat: initial version of basic repository
 
 ## 0.3.0
 
diff --git a/packages/collections-contracts/src/BasicRepository.php b/packages/collections-contracts/src/BasicRepository.php
index c89888f..15a8408 100644
--- a/packages/collections-contracts/src/BasicRepository.php
+++ b/packages/collections-contracts/src/BasicRepository.php
@@ -21,4 +21,8 @@
  */
 interface BasicRepository extends BasicReadableRepository, BasicRecollection
 {
+    /**
+     * @param T $element
+     */
+    public function remove(mixed $element): void;
 }
diff --git a/packages/collections-contracts/src/Exception/InvalidArgumentException.php b/packages/collections-contracts/src/Exception/InvalidArgumentException.php
new file mode 100644
index 0000000..0891667
--- /dev/null
+++ b/packages/collections-contracts/src/Exception/InvalidArgumentException.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of rekalogika/collections package.
+ *
+ * (c) Priyadi Iman Nurcahyo <https://rekalogika.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE file
+ * that was distributed with this source code.
+ */
+
+namespace Rekalogika\Contracts\Collections\Exception;
+
+class InvalidArgumentException extends \InvalidArgumentException implements ExceptionInterface
+{
+}
diff --git a/packages/collections-orm/src/AbstractBasicRepository.php b/packages/collections-orm/src/AbstractBasicRepository.php
new file mode 100644
index 0000000..52fefa4
--- /dev/null
+++ b/packages/collections-orm/src/AbstractBasicRepository.php
@@ -0,0 +1,178 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of rekalogika/collections package.
+ *
+ * (c) Priyadi Iman Nurcahyo <https://rekalogika.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE file
+ * that was distributed with this source code.
+ */
+
+namespace Rekalogika\Collections\ORM;
+
+use Doctrine\Common\Collections\Criteria;
+use Doctrine\Common\Collections\Order;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\QueryBuilder;
+use Rekalogika\Collections\ORM\Trait\QueryBuilderTrait;
+use Rekalogika\Contracts\Collections\BasicRepository;
+use Rekalogika\Contracts\Collections\Exception\NotFoundException;
+use Rekalogika\Contracts\Collections\Exception\UnexpectedValueException;
+use Rekalogika\Domain\Collections\Common\Configuration;
+use Rekalogika\Domain\Collections\Common\CountStrategy;
+use Rekalogika\Domain\Collections\Common\Trait\PageableTrait;
+
+/**
+ * @template TKey of array-key
+ * @template T of object
+ * @implements BasicRepository<TKey,T>
+ */
+abstract class AbstractBasicRepository implements BasicRepository
+{
+    /**
+     * @use QueryBuilderTrait<array-key,T>
+     */
+    use QueryBuilderTrait;
+
+    /**
+     * @use PageableTrait<array-key,T>
+     */
+    use PageableTrait;
+
+    private QueryBuilder $queryBuilder;
+
+    private ?int $count = 0;
+
+    /**
+     * @var non-empty-array<string,Order>
+     */
+    private readonly array $orderBy;
+
+    /**
+     * @param null|array<string,Order>|string $orderBy
+     * @param int<1,max> $itemsPerPage
+     */
+    public function __construct(
+        private EntityManagerInterface $entityManager,
+        array|string|null $orderBy = null,
+        private readonly int $itemsPerPage = 50,
+        private readonly CountStrategy $countStrategy = CountStrategy::Restrict,
+    ) {
+        // handle orderBy
+
+        if ($orderBy === null) {
+            $orderBy = Configuration::$defaultOrderBy;
+        }
+
+        if (\is_string($orderBy)) {
+            $orderBy = [$orderBy => Order::Ascending];
+        }
+
+        if (empty($orderBy)) {
+            throw new UnexpectedValueException('The order by clause cannot be empty.');
+        }
+
+        $this->orderBy = $orderBy;
+
+        $criteria = Criteria::create()->orderBy($orderBy);
+        $this->queryBuilder = $this->createQueryBuilder('e')->addCriteria($criteria);
+    }
+
+    /**
+     * @param null|array<string,Order>|string $orderBy
+     * @param int<1,max> $itemsPerPage
+     */
+    protected function with(
+        null|EntityManagerInterface $entityManager = null,
+        array|string|null $orderBy = null,
+        ?int $itemsPerPage = null,
+        ?CountStrategy $countStrategy = null,
+    ): static {
+        // @phpstan-ignore-next-line
+        return new static(
+            entityManager: $entityManager ?? $this->entityManager,
+            orderBy: $orderBy ?? $this->orderBy,
+            itemsPerPage: $itemsPerPage ?? $this->itemsPerPage,
+            countStrategy: $countStrategy ?? $this->countStrategy,
+        );
+    }
+
+    //
+    // mandatory
+    //
+
+    /**
+     * @return class-string<T>
+     */
+    abstract protected function getClass(): string;
+
+    //
+    // misc
+    //
+
+    //
+    // accessors for subclasses
+    //
+
+    final protected function getEntityManager(): EntityManagerInterface
+    {
+        return $this->entityManager;
+    }
+
+    final protected function createQueryBuilder(
+        string $alias,
+        ?string $indexBy = null
+    ): QueryBuilder {
+        return $this->getEntityManager()->createQueryBuilder()
+            ->select($alias)
+            ->from($this->getClass(), $alias, $indexBy);
+    }
+
+    //
+    // interface methods
+    //
+
+    public function getReference(int|string $key): object
+    {
+        return $this->getEntityManager()
+            ->getReference($this->getClass(), $key)
+            ?? throw new NotFoundException('Entity not found');
+    }
+
+    public function contains(mixed $element): bool
+    {
+        if (!\is_object($element)) {
+            return false;
+        }
+
+        return $this->getEntityManager()->contains($element);
+    }
+
+    public function containsKey(string|int $key): bool
+    {
+        return $this->get($key) !== null;
+    }
+
+    public function get(string|int $key): mixed
+    {
+        return $this->getEntityManager()->find($this->getClass(), $key);
+    }
+
+    public function getOrFail(string|int $key): mixed
+    {
+        return $this->get($key) ?? throw new NotFoundException('Entity not found');
+    }
+
+    public function add(mixed $element): void
+    {
+        $this->getEntityManager()->persist($element);
+    }
+
+    public function remove(mixed $element): void
+    {
+        $this->getEntityManager()->remove($element);
+    }
+}
diff --git a/psalm.xml b/psalm.xml
index 5f89a63..02f6572 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -42,6 +42,7 @@
                 <file name="packages/collections-domain/src/BasicCriteriaRecollection.php" />
                 <file name="packages/collections-orm/src/QueryCollection.php" />
                 <file name="packages/collections-orm/src/QueryPageable.php" />
+                <file name="packages/collections-orm/src/AbstractBasicRepository.php" />
             </errorLevel>
         </UnsafeInstantiation>
         <MoreSpecificReturnType>