It really does look like Shinoasa's art. Man this was really sad though, I saw the tag but somehow didn't think I would be affected. That darned last panel.
I really liked this one although it's quite sad.... Mokou surprised/sweet/sad expression in the the two panels after "I thought, maybe, that you'd write the same thing, too" is sooo beautiful I could faint...
When I deeply understood what she said about "You're not supposed to make wishes that can't come true" part... It left a much bigger impact than when I first read it...