Quick answer — ZAQ performed 6 anime themes, including "Caste Room" from Classroom of the Elite, "Dramatic Overlay" from Alma-chan Wants to Be a Family!, "Liar Veil" from Classroom of the Elite 4th Season: Second Year, First Semester.
ZAQ performed the anime theme songs "Caste Room" (Classroom of the Elite), "Dramatic Overlay" (Alma-chan Wants to Be a Family!), "Liar Veil" (Classroom of the Elite 4th Season: Second Year, First Semester), "Minor Piece" (Classroom of the Elite Season 3), "Sparkling Daydream" (Love, Chunibyo & Other Delusions), "VOICE" (Love, Chunibyo & Other Delusions - Heart Throb -).
ZAQ's first listed anime theme is "Caste Room", the opening of Classroom of the Elite.
