That's Ami, Sensei, and Maya seated at the table. They look superimposed because we're seeing them from the window, which is edge-on. lessonone7.webp lets you see where the window is that you're looking through in lessonone6, which is the image you posted.There seems to be 2 bodies attached to one another? Wtf is going on there?
The weird thing is that Sensei is for some reason facing the other direction in this image and not in the others. My guess is this is because he's so tall that from this angle his legs would clip through the child-sized table in an obvious way? Selebus has had to play a lot of stupid games with camera angles and poses in other scenes because Sensei is so much taller than everyone around him.