Why the つ after あのね？


[![enter image description
here](https://i.stack.imgur.com/E4IS5.jpg)](https://i.stack.imgur.com/E4IS5.jpg)

What's the contrasting action over here?




That's a small tsu (i.e. っ) and not a つ, and as such represents a glottal
stop. In context, this probably indicates that the utterance was cut off
suddenly -- after all, the character looks to be embarrassed or flustered.

