I Did it! The Great Proposal Plan (やた! プロポーズ大作戦 Yata! Puropōzu daisakusen) is the 123rd episode of Dr. Slump Arale-chan.
Synopsis[]
Today is Midori's birthday! Once Senbei finds out about that, he decides to propose to Midori. So he writes a letter to her about when and where they are going to meet up, and he asks Arale to give the letter to Midori. Can he finally propose to Midori?