reGretGirl Releases First Anime Tie-up Song 'Submarine Youth' Today! Music Video Also Out!
The 3-piece rock band reGretGirl from Osaka digitally released 'Submarine Youth', the opening theme for the TV anime 'I Became Friends with the Second Cutest Girl in My Class', on April 8. A music video was also published.
📋 Article Processing Timeline
- 📰 Published: April 9, 2026 at 06:00
- 🔍 Collected: April 8, 2026 at 21:30
- 🤖 AI Analyzed: April 20, 2026 at 13:44 (280h 13m after Collected)
The 3-piece rock band reGretGirl from Osaka released their New Digital Single 'Submarine Youth' today, April 8 (Wed), and their Music Video was also unveiled at 21:00.
The new song 'Submarine Youth' is the opening theme for the TV anime 'I Became Friends with the Second Cutest Girl in My Class'. It has been crafted into a light and refreshing up-tempo number perfect for a youth romantic comedy. Please also pay attention to the lyrics, which allow you to feel all of youth—its bittersweetness, fleeting nature, and delicacy.
The Music Video is set in a school and depicts two protagonists connecting their feelings, resulting in a visual brimming with a sense of speed and youthfulness.
Items reminiscent of the main anime story also appear, so please try to spot them.
■reGretGirl 'Submarine Youth' Official Music Video
https://youtu.be/2hyWBr4hceY
'I Became Friends with the Second Cutest Girl in My Class' is a life-sized youth romantic comedy that begins when the protagonist, an inconspicuous boy in class, becomes secret friends with a classmate considered 'the second cutest in the class' through a shared hobby.
The anime broadcast also started on Tuesday, April 7 at 23:30, so please check it out along with the song.
Starting in July, reGretGirl will hold a Tokyo-Nagoya-Osaka Quattro one-man tour titled 'Unforgettable One-man "Three City, Three Piece"'.
Tickets are currently accepting applications for the final official lottery advance.
Check the reGretGirl official website for details.
[Digital Single]
'Submarine Youth'
Release Date: 2026/4/8 (Wed)
https://rgg.lnk.to/submarine_youth
The new song 'Submarine Youth' is the opening theme for the TV anime 'I Became Friends with the Second Cutest Girl in My Class'. It has been crafted into a light and refreshing up-tempo number perfect for a youth romantic comedy. Please also pay attention to the lyrics, which allow you to feel all of youth—its bittersweetness, fleeting nature, and delicacy.
The Music Video is set in a school and depicts two protagonists connecting their feelings, resulting in a visual brimming with a sense of speed and youthfulness.
Items reminiscent of the main anime story also appear, so please try to spot them.
■reGretGirl 'Submarine Youth' Official Music Video
https://youtu.be/2hyWBr4hceY
'I Became Friends with the Second Cutest Girl in My Class' is a life-sized youth romantic comedy that begins when the protagonist, an inconspicuous boy in class, becomes secret friends with a classmate considered 'the second cutest in the class' through a shared hobby.
The anime broadcast also started on Tuesday, April 7 at 23:30, so please check it out along with the song.
Starting in July, reGretGirl will hold a Tokyo-Nagoya-Osaka Quattro one-man tour titled 'Unforgettable One-man "Three City, Three Piece"'.
Tickets are currently accepting applications for the final official lottery advance.
Check the reGretGirl official website for details.
[Digital Single]
'Submarine Youth'
Release Date: 2026/4/8 (Wed)
https://rgg.lnk.to/submarine_youth