An animation project directed by Ryouchimo (Ryo-timo), made as a companion piece to Aimer's album "Walpurgis".

The list of released videos included in this entry are as follows:

Night 1: The 22 O'clock Guide (第1夜 -22時の案内人-), Apr 16, 2021.
Night 2: The 26 O'clock Search (第2夜 -26時の探し物-), Jun 4, 2021.
Night 3: The 4 O'clock Letter (第3夜 -4時の手紙-), Sept 12, 2021.