If Youmu laid her head on Myon, wouldn't it crush her?

no more then laying on your arm.

Are we sure that it's yuyuko putting on the blanket? I would think it's youki, youmu's father, considering the green sleeves and manly hands.

Also I question the lap pillow tag.

Yeah, myons don't have laps.

Also, if that's really a cardboard tube sword like it appears to be, that's adorable.