Quick answer — Hikari Kodama performed 1 anime theme, including "Amanojaku" from You Can't Be In a Rom-Com with Your Childhood Friends!.
Hikari Kodama performed the anime theme songs "Amanojaku" (You Can't Be In a Rom-Com with Your Childhood Friends!).
Hikari Kodama's first listed anime theme is "Amanojaku", the ending of You Can't Be In a Rom-Com with Your Childhood Friends!.