I can't find the correct source, but I found one that is close enough to this one.

ろz said:

I can't find the correct source, but I found one that is close enough to this one.

That makes us wonder if its a paid reward.

ion288 said:

That makes us wonder if its a paid reward.

Looks like a dakimakura cover so I pretty sure the artist won't dare post a highres of it... Unless they accidentally upload it in public then delete it afterwards.