Even though Boom is normally afraid to visit the dentist, he still volunteers to be a dental case study for Petch at her university. This causes Petch to start wondering if Boom has feelings for her more than just stepsiblings. But, it is not supposed to happen because his father is planning to marry her mother. Meanwhile, Ploy, Mook's second daughter, is getting nervous when Mark, her classmate who is also a superstar and her family's favourite actor, has to frequently visit her to work on a project together. Ploy is afraid that her mum and sisters will scare him off by fangirling all over him.