Woooow, he called her like, by her 'first' name. That's like hecking embarrassing #justjapanesethings. Imagine if he actually progressed in his relationship and keeps calling her that. That would be flipping rad bro.
@nansakana I imagine that the editors wanted the romance to progress more. Author probably also mellowed out a bit, cus i doubt he is as super passionate about doing gags about bullying a teasing for 3 years then he was at the start.
So that's how it is... he had to make him have a flu to just make him call her by her first name, okay. Just hope they make progress, it's starting to get repetitive.