Sgt. Frog Episode 151: Chiruyo, Checking up on White Day / Fuyuki, I Know How to Use The Application
Episode 151 of 358 of Sgt. Frog, aired March 9, 2007, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Keroro has a brilliant plan for White Day: they`re going to make white chocolates and sell them! What could possibly go wrong with... wait, is Kululu involved in this?! Source: crunchyroll