
Akinari-san's two busy going to Venice for the holidays (according to the extras).

He's already a mentally-retarded, criminally negligent, law-student young adult...

I say that because he doesn't do anything, even though he knows what's going on, and as a college student, he's probably an adult, which would make him liable to charges in some countries, for irresponsible lack of action and condoning of dangerous behavior among children. The fact that he's a law student makes it even worse.
AKINARI-SAN.....Take those kids to psychologist...please someone take them there its the only way to save Setsu and even Hyou ╥﹏╥...such a sad manga ╥﹏╥ this is a true story this happens when one person is mentally retarded and another supports him for this and this passes to generation also ...that's why stop it before its too late ╥﹏╥ counselling is the only best option ╥﹏╥