Haveninmuse:
I heard he has done before too, such as for the drama Love You Seven Times. But the most I've ever seen is his dedication to Musheng. Singing the OST, making the extra clips, lots of promo/photoshoot with Esther Yu, BTS, even learning sandart.
Ah, I see. That's really heartwarming to see his dedication to his characters. Given Love Game's popularity, I'm sure fans are eating up all these extras. I haven't watched BTS stuff yet since I haven't finished the drama yet, but it seems like the actors would have fun playing their characters, seeing as how the script is so far. =)