Gintama - S1: Episode 11
Look, Overly Sticky Sweet Dumplings Are Not Real Dumplings, You Idiot!
The trio helps an old man to track down a woman whom he met when he was young. Shown as a one hour special with episode 12.

The trio helps an old man to track down a woman whom he met when he was young. Shown as a one hour special with episode 12.