I was wondering what people think about this. Crossing over between Nitta-sensei's various works feels natural to me, since they all happen in the same time frame, apart from Fuyu no Semi.

- Is canon, to you, only Harudaki ch 1-49? Do the extras count? Are all Nitta-sensei's works one canon, no matter universe?
- Should the universes be kept separate to be canon-compliant?
- Are the doujinshis in Balalaika canon?
- Everything Nitta-sensei ever drew? Wrote? Said?
- Do you find it easy to include the drawn canon?