My final verdict on "MuTeLuv: Hi By My Luck": I liked it - although where mega-cuties Keen and Chokun are involved, I'm not entirely sure if I'm biologically able to be objective. As part of an anthology, the individual stories have the added virtue of being short.
GMMTV's strength is its in-house star cast, and my fondness for my GMMTV favourite actors is generally my #1 reason for watching their productions. Which brings me to the next subject: Should I watch the next story ("Not My Father")? It's not BL, but it has Nani and Prem. I guess I'll wait for the reviews. In any case, I'll definitely absolutely watch the third story starting in five weeks: "Diva Deva Mata" with the incomparable Lego!
ETA: Relating to "Hi By My Luck", I need to make a confession here: I was in my high school math club. (Yes, I was a nerd.) And what's more, I really liked it. The competitions were fun! So aside from Keen and Chokun, that's an additional personal reason that I connected to this story.