Ultimately, the father of the twins was saved by his son's siscon. What a dramatic twist, real Ruby ex machina!
But anyway, the whole chapter felt like something of a start to the final chapter until they abruptly moved on to another topic. It felt a bit rushed, as if Aqua went through the "you're still not alone" phase in just a couple of minutes to move on to a new plot issue. Not the end of the world and all living things, but I was a little confused by the timing.
And where is Kana? Akane looks like she's now in the "lovers in the past, best friends now" phase. And considering that MC decided to stop his siscon within reasonable limits, we know who the only option remains.