Part 2, Episode 10 of The Case Study of Vanitas (also known as Episode 22, "Blue Night") is a pivotal, emotionally heavy chapter that finally unmasks the trauma of Vanitas's past.
The episode primarily follows Noé as he drinks Mikhail’s blood, granting him a "blood dive" into the shared memories of Vanitas and Mikhail. Blue Night | Jun Mochizuki Wiki | Fandom Vanitas no Carte Part 2 Episode 10