Ash and Zen, Inosuke, and Tanjiro found a pretty crystal at a thrift store until Ino and Ash were shunned w/ a bright light and turned into kids

Tanjiro: "oh.my.god."

Zenitsu: "..huh—"

Ash looks up at them and holds Ino's haori cause, well theyr kids and they have no memory of Tan and Zen