The stage will first spawn an Ultimate Bondage Cat, and you need to kill it fast as the stage will continuously spawn them along with the other enemies, alternating between one Otta-smack-u and one St. Pigge the 2nd.
Strategy 1 (mid-level, ft. Driller Cat)
If your cats' levels are around 30, Driller's effect allows you to win because it cuts a single enemy's attack down to 10% at a distance. Li'l Nyandam is also good for its AOE slow effect. Tesalan Pasalan can be a good choice (better than C. Bahamut) when the Ultimate Bondage Cats have not stacked up to 4 of them yet.
The base has very high health, so if you don't destroy it in a short time, don't get surprised when the Ultimate Bondage Cat stack kills many of your cats!