What is the first moment of upendo relationship Nagisa-Tomoya?

wewe know that a major upendo story in this anime is around Nagisa and Tomoya relationship. wewe also obviously know that in Chapter 22 Tomoya finally confess his upendo directly to Nagisa and they start become lovers.

But I believe that there are some moments before it that shows Nagisa and Tomoya feel in upendo each other.

So, I want to hear your opinion about the first moment seen in this anime that onyesha Nagisa and Tomoya feel in upendo each other. wewe can mention the chapter which shows that moment and the reason wewe choose it as the first moment.

I upendo the romantic plot shown is this anime, so I believe get some interesting moments in it with all of your opinion in this question.

Thank wewe for your answers. :)