While I'd love for that to happen. I think she probably used the tactic of calling their father in advance. Honestly it might even be that their father is behind the whole "remove the gen ed class" thing.
I believe he is very similar. Considering other universe sui probably picked his universe because he was nearly identical to him. I also don't remember her ever being surprised at how he acted.
As a Yami fan, I totally get the hate.
Yami did a LOT wrong.
But what's with the Yuu hate? I mean what did you expect?
Who in their right fucking mind would tell their clearly depressed best friend "oh, I just ran into my ex-girlfriend and made out with her, that's why I'm late" or "I just got...
We do know who initiated it. It was yami, we saw it 8 months ago (ch. 21).
It also kinda looked like she slapped him before that. Yuu also tried to say something starting with "I like..." But got interrupted by being kissed.
And apparently the whole situation was 30 min ago.