Extra Chapter 4 (Quartet Knights)

This unnamed chapter is a collection of short comics of Tashiro Yumiya's Black Clover Side-Story: Quartet Knights.

Summary
Finral Roulacase attempts to remove the spell that turned Yami Sukehiro into a teenager but accidentally turns Yami into a toddler. After Finral manages to reverse his spell, Charlotte Roselei arrives with a bag full of children's toys.