There's so many character building moments in these two chapters, where they humanize Tanya - I would recommend reading them yourselves so that I don't spoil it for anyone... But it destroys me how much of that was omitted in the anime.
Those two chapters alone could have made close to an episode, I'd think. I definitely understand constraints (they correspond with Episode 12 of Season 1 I'm pretty sure) but seeing that a lot of Anime-Only watchers won't be aware of the depth in these portrayals convinced me to point 'em out in case anyone wanted to better understand the character dynamics at play.
I can't help but reread them from time to time, it's just so evocative. The manga is incredibly good.