What is the song in My hero academia season 4 episode 83 played at 23:48 during the preview What is the song in My hero academia season 4 episode 83 played at 23:48 during the preview

It also appears somewhere during the middle of the episode
The song is called 士傑と雄英 ("Shiji and Yuhide" per Google Translate) by Yuki Hayashi. You can find the song on Spotify here.