Episode 4

Rain Is the Melody of War ～It Always Starts With Rain～ (雨音は戦いの調べ～始まりはいつも雨～, Ameon wa tatakai no Shirabe ～Hajimari wa itsumo ame～) is the fourth episode of the Oda Cinnamon Nobunaga anime series.

Summary
After taking a walk in the rain, Oda hears about and meets Marutarō at the park. After viewing Halloween events on television, Oda and Boo witness a musical based on swords. Ichiko is waiting for Hideto Mitsu before learning that he is returning to Seira.

Plot
It is raining, and Cinnamon hears from Ichiko that he cannot go on a walk again. He remembers past battles as a human that occurred during the rain.

Wearing a plastic coat, Cinnamon is able to go outside. Back at home, Oda observes Ichiko reading about the miso soup diet in a magazine. Oda has not had any Miso since he was a dog. Envisioning how to make some, he is then just as pleased at eating dog food, the wet dog food even more so.

At the park, Oda hears about Sanada Marutarō Yukimura whilst with Julian, Boo and Lucky. Boo is aware Sanada has also been reincarnated as a dog, shortly before he arrives at the park.

Watching Halloween events on television, Oda considers young people's desire to stand out. Ichiko provides a large pumpkin outfit for him to wear. After meeting Lucky with Julian, Oda finds Boo with his owner, Ai. She is with Ichiko as they plan to watch Kentou Enbu musicals featuring men who dress up as swords.

As Marutarō receives attention at the park, the other dog warriors discuss their past exploits and how Marutarō's are no match compared to theirs.

Ichiko waits on a bench, asking Cinnamon if he thinks Hideto Mitsu will pass by. He does, with Akechi on his shoulder. Complimenting his shirt, Ichiko does not appear happy to hear that Seira ironed his shirt.

Characters

 * Ichiko Oda
 * Oda Cinnamon Nobunaga
 * Ueusugi Julian Kenshin
 * Date Boo Masamune
 * Takeda Lucky Shingen
 * Sanada Marutarō Yukimura
 * Ai
 * Hideto Mitsu
 * Akechi Mitsuhide
 * Seira Honganji (mentioned)