It's curious. The first couple time I read this one, I always agreed with Fumihiro and thought Shunpei was in the wrong, but nowadays it's not it at all. Shunpei is always trying his best to put Fumihiro at easy, but Fumihiro makes up problems on his own. "Hiding things". Have you thought that maybe Shunpei just thought it wasn't important enough to bring up, since he knew it would upset you for nothing? The situation with Mayu, the situation with coming out for his friends, the situation with being together even? Fumihiro is way too insecure for a partner that never did anything to deserve such reaction. Every single time Fumihiro got upset, it could have been resolved with a single honest conversation. Shunpei, on the other hand? Every single time he gets insecure, is because Fumihiro is acting weirdly, either sneaking around or outright ignoring him.
And I just think it's interesting, seeing my reactions a few years ago compared to today.
Elektel Delusion