For Freebat, the motivation could be simple anger. Maybe Billy said or did something that made Freebat really mad, and without thinking, Freebat lashed out and hurt Billy, causing him to cry.
Billy's motivation might be to seek justice or understanding. After being hurt by Freebat, he could be trying to figure out why Freebat did what he did. He might be crying not just from the pain, but also from the confusion and hurt of being attacked by someone he thought was a friend. As for Freebat, it could also be a power struggle. If Freebat feels that Billy has some sort of power or influence over others that Freebat wants, that could be a motivation for his actions.
Perhaps Freebat is motivated by self - preservation. He might think that Billy is a threat in some way, like Billy could expose a secret of Freebat's. So, in an attempt to protect himself, Freebat hurts Billy. Billy, on the other hand, is crying because he is shocked and hurt. His motivation then could be to find a way to forgive Freebat if possible, or at least to make sure that such a thing doesn't happen again. He may also be motivated by the need to regain his own sense of safety and trust.
Chapter 383, "Doomsday Beehive", is the clearest early answer because it turns Shen Lan's situation into a concrete plot event.
Chapter 626, "Emergency PR!", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The drone hovering in mid-air had precisely captured this scene, and...
Chapter 604, "Shiguang, originally named Shen Guang", is the clearest early answer because it turns Shiguang's situation into a concrete plot event. The chapter gives readers a real answer by opening on Fortunately, the other person did not recognize him; they just stared...
Chapter 528, "Cursed", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. It opens with The netizens almost unanimously started to sympathize with Jiang... and closes on The current balance is 89!] Su Yinwan: "...." She was tired..
Chapter 651, "Is This... A Military Fighter Jet?!", is the clearest early answer because the buildup finally cashes out in a real clash. A useful checkpoint is the way the scene starts with He Pingzhang's first action upon being summoned was to rush to the...
Chapter 506, "The Female Devil Can Die", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Nearly three teams had been squatting in surveillance outside the...
Chapter 283, "You Will Never Understand the Importance of Family!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. Early on, Shen Lan furrowed her brows as Jiang Shixu suddenly appeared before....
Chapter 559, "This is the Worldview of the Main Female Lead", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with You!" Ai Xiaochun gasped, unable to speak, her teeth clenched as she...
Chapter 567, "Distant Nephew, Long Time No See", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from After separating from Jiang Li and the others, Team L headed in the...
Chapter 663, "How Did These Two Start Fighting?!", is the clearest early answer because the buildup finally cashes out in a real clash. The chapter gives readers a real answer by opening on Jiang Shixu received the message in daylight the next day.