Iona claims she's emotionless, but Gunzou knows she has human emotions, deep down. He tries to teach her more about human culture, but he accidentally flirts with her, which makes her experience emotions she didn't know she could have.
Iona feels like she's meant to lack human emotions, but Gunzou is determined to make her feel true emotions. In the process, Gunzou and Iona's feelings for one another get revealed.
Some one-shots focusing on the close bond between Captain Gunzou and Iona.