Girl apologizes to customer while two girls stand by the window

It's a quiet moment in what looks like a diner or cafe. A girl is at the counter talking to a man, saying she's sorry for someone's behavior. Behind her, near the big windows, two girls are standing around — one with dark hair, the other with lighter hair. The place has red booths and wooden walls, and the sunlight is coming in. The mood feels calm but maybe a little tense, since the girl is apologizing. The man she's talking to is sitting down, and she's standing. The two girls by the window don't seem to be involved in the conversation, just standing there. It's not a big scene, just a normal moment in a public place, but the dialogue makes you wonder what happened. The art style is clean, like an anime or cartoon. No big action, just people talking and standing around.