-doujindesu.tv--tsuitaiken--pov--jiko-bukken--1...

: This likely indicates that the content is part of a series, and this specific item is the first in that series.

I step into the main room.

There is no floor above me. The apartment ends at this ceiling. -Doujindesu.TV--Tsuitaiken--POV--Jiko-Bukken--1...