Apocalypse Later!

According to Nostradamus, the Lord of Terror will come and will reign over Earth in the year 1999. However, it's 2004 and the Lord has finally arrived... in the image of a Shibuya kogal high school girl. And in spite of her lateness, she still intends to fulfill her assignment and destroy Earth, along with the Gunpla modeling factory. Now it's up to everyone to either help or hinder her.
Mois has been spending a lot of time with Keroro in the Hinata household, and Tamama is very jealous. So when Tamama cooks up a plan to finish her up... but could this alien that is dark with jealousy defeat someone as pure and innocent as Mois?