Sgt. Frog Season 3 Episode 116 Keroro: Get The Glimmerbath, Sir! / Mois: Uncle Diary, Sir!

Keroro realizes that he's never had a glimmerbath, which is the first bath taken after a tub's been cleaned and polished. Resentful that Natsumi is always the first in, he tries to get her to concede it to him!