There is no single chapter where we see them interacting with each other, like a normal co...

There is no single chapter where we see them interacting with each other, like a normal conversation, I mean what do they talk with each other? I have the impression that Natchi is like always silent? Yeah they go back home together after school and they eat together but what do they talk about everyday when they are alone? why are they so taken with each other? ╮(￣▽￣)╭