The "posters" used here are (from left to right):
post #1125132 (Konpaku_Youmu)
post #1122954 (Mononobe_no_Futo)
post #1076346 (Beerko)

The commentary reads as follows:

この時期、よく忘れられる存在。

「・・・取りに来ないね。」「もしかして、わちき達、忘れられたかな・・・？」

Forgotten again?

Alignn said:
Forgotten again?

always

Forgotten Privateer.

He surpassed himself in d*ckery this time...again.

It's an umbrella stand, don't worry. They just want lovers too.

alunral said:
It's an umbrella stand, don't worry. They just want lovers too.

And who do you think left him there?
I'd be willing to bet that the pixiv commentary says something like "He's coming back, right? Right?"

I'd assume the Kogasa children have been put up for adoption.

Ideal: Open a "Missed Objects Stand"
Until the owner comes for the missed object, stays with you.

This Time, Their Existence Was Completely Forgotten.

"...He isn't coming to get us." "Maybe... he forgot about us...?

Damn it, I knew it. That's incredibly depressing.

Anyone else noticed that the Kogasa kids all look a lot older now?

FartFromTheHeart said:
Anyone else noticed that the Kogasa kids all look a lot older now?

A Karakasa Obake isn't fully grown until it has been abandoned.