
Quick answer — Masayuki Suzuki performed 2 anime themes, including "GIRI GIRI" from Kaguya-sama: Love is War -Ultra Romantic-, "Love is Show" from Kaguya-sama: Love is War -The First Kiss That Never Ends-.
Masayuki Suzuki performed the anime theme songs "GIRI GIRI" (Kaguya-sama: Love is War -Ultra Romantic-), "Love is Show" (Kaguya-sama: Love is War -The First Kiss That Never Ends-).
Masayuki Suzuki's first listed anime theme is "GIRI GIRI", the opening of Kaguya-sama: Love is War -Ultra Romantic-.