The song is “over and over” by Nagi Yanagi and is being presented as part of the NBC Universal Anime ✕ Music 30th Project.
The fall 2017 anime series Just Because! is getting some renewed attention as NBC Universal Japan has gone and added their opening theme song for the show to their YouTube channel.
The show was directed by Atsushi Kobayashi based on the script by Hajime Kamoshita.
TVアニメ「Just Because!」 OP映像 (やなぎなぎ/over and over )【NBCユニバーサルAnime✕Music30周年記念OP/ED毎日投稿企画】