1. Don't underestimate an imouto-chan.
2. He's an official ojou-sama now, never saw that coming. From my experience of being a mango reader, it's basically unheard of.
- I dread what his imouto would think of this, as there's officially no room for an excuse for misunderstanding at this point.
3. I have never predicted any of this type of progress in a harem.