
Quick answer — Yuika Nagai worked on An Observation Log of My Fiancée Who Calls Herself a Villainess (Color Design Assistance), I Want to Love You Till Your Dying Day (Color Design).
Yuika Nagai worked on An Observation Log of My Fiancée Who Calls Herself a Villainess (Color Design Assistance), I Want to Love You Till Your Dying Day (Color Design).