I am following him both on Twitter and Instagram. How do you see the story?
I'm not accusing you of being stupid, just curious as to where it is.
Stories are the circles at the top of your screen on the home page of the app.
Or, go to Tomer's account and tap his circular avatar which probably has a pink circle around it.
(I rarely look at regular feeds on Instagram, just stories. They tend to be a lot more interesting)