(re "Knock Knock Boys") I quite enjoyed it, despite some considerable weaknesses in story and writing. It's very lightweight comedy with some parts better than others, but generally cute with just enough sex appeal and cuties.
I also like Seng (especially as Toh in "Secret Crush"), but in this series, I especially enjoyed Jaonine.
Anyways, if you like fluff (which RXinw, being of more refined tastes, generally does not), you might want to try an episode or two and see if it's for you.