Source: https://e-hentai.org/g/3463483/9fa2a42c43/
Original title: オチをたずねて幻想郷 | Romaji: Ochi wo Tazunete Gensoukyo
A collection of 4komas mainly featuring the cast from Embodiment of the Scarlet Devil to Perfect Memento in Strict Sense.
Volume 2: pool #28728
Volume 3: pool #29144
