So I'm watching one of the revolving weekly Japanese dramas, staring at it going "gee, that male lead looks really familiar. No, really, he totally looks familiar. Isn't that Wentz?"
Well, actually, yeah, it is. Uh... Damn I'm good?
The show is Kirakirai Kenshui. It's currently airing on Saturdays on channel 26 at 8:30 PM, subtitled in English.
And the end song is done by Ohtsuka Ai. Which I also managed to ID correctly. Man, I have been assimilated.