Responses
I took it as he meant "different" in the sense of how things were back in HS compared to now. Because now they both know their feelings are mutual and there are no more misunderstandings. Not "different" as in OMG now he's flipped a switch and he's really a heterosexual spy who stalks gays to fall in love with him before breaking their hearts. I think the hardest part will be Akagi not becoming a total sex fiend perv who wants to do it with Ichimori 24/7! haha

The seme seems a little off...