This is all I know:

Love: Must Take It Off (this isn't an official title) is one of the short films for the Love By Chance/Cathy Doll collaboration. It's to promote Cathy Doll's beauty products, such as Ready 2 White (which Can used in Love By Chance episode 13). However, even though the short films use some of the same cast as LBC, the characters are different. Also, the films will be shown at the Siam Pavalai Royal Grand Theatre on May 5. I don't know if they will be shown elsewhere or even put online though.