Other songs titled "Saihate" by artists like Minori Suzuki or SennaRin are also available.
You can find the full, legal download options and official audio for "Saihate" by APOGEE (released November 9, 2022) at these links: Amazon Music Apple Music Friendship YouTube
鈴木みのり (Minori Suzuki) - サイハテ (Saihate) (Romanized)