The Drifting Classroom, Vol. 11

I didn't plan to read ALL 11 VOLUMES, but I fell in love after the first one so i binged them all in like 24 hours.

I don't want this series to end. I need more, I NEED to know what happens and how it happens and how they cope with everything. I NEED MORE DETAILS

Also I'm wondering if Yu studied like he promised and built the spaceship that landed in the future.