I believe in the novel he (Yuki) set up this moment by warning them they were fragile. I remember knowing they were going break after he gave them to her. I can't remember though if it was something he bought or a test item he made. In any case they were always doomed to break.
Artist: I wanna draw her ass!
Editor: Ok, but you should probably cover it just enough so we can release it in a Shonen.
Artist: I'll cover it with a tail since she acts like a cat!
Editor: Brilliant, fucking send it.
This MF'er: Fucking Furry!
But it's him that believes he can't solo it, going by his reaction and question last chapter (pg 20-21). He's trying to earn an achievement this time to avoid schooling, that was the point of this. So, why would he want to shift it?