# 【Tutorial 21】#Pet Release System# How to Release Pets to Earn Upgrade Materials

The **Pet Release System** allows players to set their captured pets free in exchange for valuable in-game resources. When a pet is released, the player will receive a certain amount of **Fragments**, which are essential materials used for **Pet Star-Up** (upgrading a pet’s star level).

**How It Works**

1. Players can select any pet they no longer need and choose the **“Set them free”** option.
2. Once confirmed, the pet will be permanently removed from the player’s inventory.
3. In return, players receive **Fragments** based on the pet’s rarity and level.

**Fragment Utility**

* **Star-Up Material:** Fragments are used to upgrade the star level of other pets, improving their attributes and overall battle power.
* **Progression Resource:** The Pet Release System ensures a sustainable in-game economy, encouraging players to capture, upgrade, and optimize their pet lineup.

**Key Notes**

* Released pets cannot be restored.
* Higher rarity pets yield higher rarity **Fragments**.
* Strategic release of surplus pets helps players grow stronger more efficiently.

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**SSR** and **SR** pets **cannot be released**. **S**, **A**, and **B** grade pets can be released to obtain a **Star-Up Material** corresponding to their Rarity.

**Pet Release Material Table:**

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**Star Wings:** This item can only be obtained from **event drops** and **cannot be acquired through pet release**.

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