looking for a certain yaoi... its a teacherXstudent.. the student is like a model student and its supernatural... the teacher is a demon and wants the student for himself.. at the end of the story the student became a teacher himself together with the seme(teacher) i remember there is a gore there.. there are torn apart bodies and there is a time the student(uke) was bullied and the one who bullied him got cursed.. like a worm..? came out of his body..

thanks in advance!!

That should be Yokubou no Shizuku =3

a life saver came!!! thanks for the help! XD