The theme of growth is also common. As they fall in love, they both grow as individuals. Sheldon might become more in tune with his emotions, and Penny might become more patient. Another theme is the reaction of their friends. Their friends' opinions and reactions often play a big part in the story.
Well, there's often the theme of unexpected love. Given their initial relationship as just neighbors and friends with very different lifestyles, the idea that they could fall in love is unexpected. Also, there can be a theme of acceptance. They have to accept each other's flaws and differences as they enter into a romantic relationship. For instance, Sheldon has to accept Penny's party - loving nature, and Penny has to accept Sheldon's OCD - like tendencies.
Chapter 238, "The Guests Were Dumbfounded, The Audience Was Excited", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event.
Chapter 246, "Betting He Can't Last Even One Second", is the clearest early answer because it turns Director Sun's situation into a concrete plot event.
Chapter 354, "Mr. Luo, Aren't We Unfamiliar?", is the clearest early answer because it turns Liu Suqing's situation into a concrete plot event.
Chapter 718, "This Person Is No Longer the Same Person", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. The chapter turns that into something concrete by moving from Changqing noticed her amazed gaze and his eyes also shifted to the...
Chapter 327, "Official Announcement Entering the Circle!", is the clearest early answer because it pushes Jiang Li into a new phase or setting. The chapter gives readers a real answer by opening on Three hours later, the shoot was over, and Shen Lan personally picked...
Chapter 304, "Shh, Let's Not Disturb Big Sister", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event.
Chapter 228, "Younger Brother is the Number One Hater?!", is the clearest early answer because it turns Huo Xuan's situation into a concrete plot event. The chapter gives readers a real answer by opening on Huo Ziyang had not stepped out of the house for a whole week.
Chapter 594, "Raising Soldiers for a Thousand Days, Using Them for a Moment", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event.
Chapter 138, "From now on, let's get to know each other again", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. Early on, Is there such a good deal?. By the end, Could it be that the poison also had a side effect of making a person....
Chapter 484, "Gu Yu Returns to the Country!", is the clearest early answer because it pushes Bai Lu into a new phase or setting. Early on, More raw meat aroma wafted over, and the boar that was on its last.... By the end, Now, to their surprise, they saw the most troublesome wild boar being....