Not From This Sea, Are You? / Why Not Join the School of Fish? / Wouldn’t Having a Pet Be Squidtastic?

Opening Credits · OVA Opening | Let's☆Invasion Time! - ULTRA-PRISM

Opening Credits · S1 Opening | Shinryaku no Susume☆ (Let's Invade!☆) - ULTRA-PRISM with Hisako Kanemoto