Next chapter is in late April for the record. Manga will be taking a month off while preparing for Volume 2's release on the same day as the next chapter.
'ITEM' has arrived. It's hard to tell in this chapter but in page 18 the seemingly out of place panel of the ceiling denotes where Mugino and Takitsubo are. Described in the book as simply "Above the ceiling". Guess they're in a vent?