Overview:When KK plans to throw a birthday party for Tin, Tin comes up with an idea and gets Tze Chin to pretend to be his girlfriend. Tin runs into Darren's son, Ryan, while he's on his way to work. When he finds out that Darren is divorced and refuses to see his son, he and Siu Muk try to help mend their relationship. After Darren's incident, Tin finally makes up his mind to talk to KK