Nanami and Yuji were just that a small family. Well not by blood of course. Nanami pretty much adopted Yuji after the Mahito accident.

So of course when it came to it. Nanami trains Yuji. So he won't ever have to fear dying again like he has done once.

Yuji was grateful to have a father figure. Sure he was going to miss his grandfather but this was just fine.

But then Nanami had decided to try out small dates. Just to relax a little bit. Because Yuji told him he was far too stressed.