Okay
there are 2 doujinshis I'm looking for

First
A female Biology teacher showes the human anatomy to her students by cutting herself open. (rough discrition) Title was something with "3rd Grade Biology class" or near that.

Second
A unpopular female student is forced by the teacher to be a bisection subject. Somthing like Unpopular Student" or something.

Maybe I remember some details of both Storys but it's a minute since I saw them around. (Bearbeitet)