Hn, that's right! I think Junta doesn't really have feelings for sensei (it's just a bluff though), he just wanted to isolate Akira and make him feel betrayed because he doesn't want anyone to take a hold of his oniichan. owo Pretty cliche, neh?! =w=
I'm glad he finally started to realize his feelings for Naoya. ヾ(☆▽☆)