Sato posted a short post-series bonus comic on Twitter: https://twitter.com/sasasatotototo/status/1290543335505985537
Dear Jesus,
Please give me the power to suddenly be able to read Japanese so I can enjoy these pics.
Love, Beefaroni
Since it's only two pages, I took a stab at translating it.
Text of Tweet:
Moritani-san and Murakami-san now they've dated a few times.
Page 1
Ugh...
I guess Murakami-san isn't here yet...
I came in the matching outfit she got me when went out together the other day, but...
isn't it weird how it shows my legs? It's embarrassing...
Hey, you!
Page 2
Waiting for someone? Got a minute?
Hwah!?
Eh!? W-who's this...?
I knew it, Murakami-san's matching...
[aside] Awawa
Hey.
That girl's cute, isn't she?
But I'm not letting you have her.
Murakami-san!
Hey there, honey!
[aside] I got in the way...
Note: Bottom panel of page 1 looks like a flashback, but I have no idea if Sato ever drew that episode.