@Meyujin he held her hand and came close to her face, with a threat to kiss her. If she was a stranger, that's sexual assault. He was lucky he only got punched. Anyone would feel that way, too, if someone suddenly came up to you and push himself into your personal space. Yes, they're friends, and they've known themselves for a long time, but the guy just invaded her personal space. In a burst of emotions, of course the girl had the right to punch her! She's just overwhelmed with emotions. She didn't meant that in any way.
The boy was a jerk. He was incorrect with his actions.
The girl was caught between a rock and a hard place. She, too, was also incorrect in her actions.
And the readers understand that. Besides, did anything cute happened in this chapter yet??
... But if you're going to insult readers for seeing this as cute, and misjudging this SINGLE CHAPTER as sexist, then you just punched us in the face, my dear commenter. Ironic that you're complaining about being punched, too.
If this isn't your demographic, go somewhere else and spout your nonsense there.