Conception: Ore no Kodomo wo Undekure! S01E04 - Secrets in the Early Afternoon

Itsuki bonds with Yuzuha, Maiden of Pisces. She works as a painter, but uses a coffin as bed for some reason, and drew what she saw in dreams while sleeping inside it. She seems to be in a slump, so Itsuki asks her out on a date as a change of pace. Then she shows up carrying the coffin with her...