They are not ero. Basically this means ‘forget about it’. The only company around localizing non-H games is Hirameki. And they’re in real trouble if they don’t get new titles in the pipeline; there’s no way they afford to pay for rights to something like SisPri.
A bigger problem is this: eroge have low enough sales. Getting people to pay for non-eroge b-games is going to be even harder since there’s not the obvious hook.
Certainly not impossible, but basically close enough to it. Especially for PeaPri.