Yuuwaku

Both was dubbed by same team but Mejoku is more of a final form of it.  

Both feature not your lame standard art/animation but are very distinct in that area. Also both have some actual plot and both deal with drugs. 

They both contains main character as a male teacher and like had sex with female students. Both happens at school. Both are hentai. The students were initially blackmailed but then like to have sex. If you liked After class lesson there is a chance that you might like yuuwaku. 

Both contains a teacher as main focus. Both are loved by their students. Both are blackmailed. In Kodomo no jikan teacher is blackmailed by kokonoe at first but later on he enjoys it and in Temptations teacher is blackmailed by the principle but then later on enjoys it. Both have student who is innocent from inside, both want to have sex with their teacher, Both love deeply and both have teacher who do not understand their love as in Kodomo no jikan he do not understand her love as she is a kid but in Temptations he do not understand her love because he is selfless. And Kodomo no jikan is not hentai.  read more 

The heroine is trained to become a slex slave through the facade of romance. The story is dark-toned and is made for the those who hate happy endings.