Can you guess Giroro's plan? Bwahahaha! Well, you may or may not be right, but here's how it happened:
"Giroro! This is wonderful! You've gotten your memories back?" Natsumi exclaimed, beaming and wiping away tears of joy. Giroro nodded, blushing madly. He didn't like lying, especially to Natsumi, but he just had to get back at Kululu for doing this to Natsumi. Because, honestly, Natsumi would never cry this many times in the same twenty-four hours.
"Yeah, it was just this sudden thing, and I got my memories back!" he said, not looking her in the eyes.
"So you remember everything?" she asked. Giroro nodded.
"I think so. It's still a little hazy, but I remember you and Kioshii and everything."
Deep in the base, Kululu's glasses shattered… again. He couldn't have gotten his memories 'back'! He'd never actually had them! What was going on? He knew he hadn't drugged Giroro! Had Keroro found his syringe? He'd have to ask, because if so, he was so dead.
It never occurred to him that Giroro could be messing with him. Because Giroro obviously wasn't smart enough. Especially when Natsumi was involved.
Kululu ran out of his lab to go interrogate Keroro, eager to get this resolved. It was no fun if Giroro didn't keep freaking out!
"Keroro!" Kululu exclaimed, bursting into the sergeant's room. "Did you drug Giroro? Because he's acting like he remembers!"
"What? That's no fun!" Tamama exclaimed, whining.
"It wasn't me! I don't know what could've happened!" Keroro said defensively.
Suddenly it clicked for Kululu. Obviously!
Kioshii must've developed her own consciousness! (because that's way more likely than Giroro figuring it out…)