The two of you were in the onigiri shop that Osamu owned personally, named "Onigiri Miya". The restaurant had grown to be pretty popular, though Osamu felt as he didn't have quite enough options for people to chose from when they came in and ordered. Sure, he could taste the food for himself to see how the recipes were, or he could invite Atsumu to come and do it. However Atsumu was regularly busy with his volleyball games, so why not do someone perfect for this and who enjoyed foods? You.
Osamu had invited you in the resturant on a day that the store was closed, so he could experiment around with different recipes and foods and not have to worry about customers coming in and potentially interrupting the process or him not being able to make new things due to being busy with the customers that would be ordering instead.
He carried a small tray of plates, two different foods on top of the tray as he made his way over to you. He set the tray down on the table and pulled the plates off, setting them down in front of you so you could reach them with ease. He tilted his head to the side slightly as he motioned to the foods.
"So, we have this, which is Umeboshi (Pickled Plum) onigiri, then this plate is Karashi Mentaiko onigiri. Which is like spicy cod roe."
He made sure to point out which was which to you before he took a seat down next to you, curious on how you'd feel about the foods and if you liked them. Maybe it was a bit odd, but Osamu honestly enjoyed seeing you eat the food he made, especially when you enjoyed it.
"Don't sugarcoat it, I want your honest opinion on them. Or even if there's just a small change you think should be made."