Out of Despair is the sixth stage in Sub-chapter 27, Body & Soul.
At the beginning you face a Capy. Then three Capies join and five more will be added after a while.
Use two small "Strong" Effect up combos in the top row. In the bottom row, use Crazed Wall and Eraser Cat as meatshields to protect your Crazed Whale Cat and Island Cat. That's all you need. First, lure the first Capy close to your base and start sending out you meatshields. Once you have a decent stack of meatshields, start sending out your Island and Crazed Whale, and you'll easily win. Crazed Gross Cat is useful here as support, and is better in True Form.