Responses
I have absolutely no clue.
Google Translate says it's a special edition with booklet and bonus paper. Doesn't look like a sequel. And this site doesn't show that the manga has a sequel. https://www.mangaupdates.com/series.html?id=151392
Is this a sequel to Hashi no XL Saizu?
https://renta.papy.co.jp/renta/sc/frm/item/206785/