Aizou (TAMAQUIS Wren)
Not entirely sure what was happening there. I mean, it was messed up and intriguing, though as a one shot, it leaves a lot out. The way it ends, it isn't clear whether or not this was a roleplay between them the entire time or overcompensation on the part of the younger brother.
Nocturnal Flight
Haha, definitely messed up, but it could be worse! I wish it were longer and played with the psychology of it more, but man,that poor kid. And the cycle continues. No way is this gonna be a healthy relationship, but I get the sense that this boy won't be able to walk away after. That supposed "sensei" is a piece of crap, of course, but certainly he does stuff like this all the time, moving on when he gets bored. Maybe someday he'll get what's coming to him.
Kyoushitsu no Yugami