Brothers ~ koisuru oniisama ~

I just started playing and am getting the feeling that Morikubo Shoutarou and Okiayu Ryoutarou are both in it.
Not to mention that the Father looks like Urahara Kisuke to me.
Oh my, this WILL be fun

EDIT: I was so wrong. But the eldest brother still does sound like Okiayu Ryoutaro so I'll just pretend it's him =P