anyone know other good spanking games like this and kana sensei?
None that are much like kana sensei (that one plays more like Missy with video). Like this one, not anymore, but if you like frustration, you may still be able to find Stormside (abandoned). Like this thematically, That New Teacher and Cosy Cafe both qualify. The first has a much smaller character tree, the second is a linear story with zero sandbox at all.