As if shuin had longer hair. He really do can pretend to become Yuna's mom. *Whoops*

*Camera on Shuin*
You see shuin look like mother face on that angle. Who try to protect her daughter with motherly Monalisa's smile :P

*Sphere on Yuna*
And Yuna like seeking a protection from her mom. Take cover. Like she gonna said "Mom~ I'm cold and hungry... "

That's why I said they look like a pair of mother and daughter.