
8.0
Spring in the first year of high school. Kumiko, a member of the brass band in junior high school, visits the high school brass band club with classmates Hazuki and Sapphire. There, she comes across Reina, her former classmate from junior high. Hazuki and Sapphire decide to join the club, but Kumiko can’t make up her mind. She recollects her experience with Reina at a competition in junior high school.
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1Episode 1Welcome to High School
24 min
Kumiko enters Kitauji High School having been unable to forget what Reina said at a middle school concert band competition. She goes to visit the concert band at school along with classmates Hazuki and Sapphire, where they meet Reina again.
2Episode 2Nice to Meet You, Euphonium
24 min
Kumiko and the others join the concert band, and they choose their instruments. Their eccentric senior, Asuka, still likes to mess with them.
3Episode 3The First Ensemble
24 min
Kitauji High School Concert Band is preparing their parts for the ensemble, but some students are fooling around when they should be practicing.
4Episode 4Singing Solfège
24 min
Kumiko and the others prepare for Sunrise Festival. Kumiko and Shuichi talk about Taki-sensei on the way home from school, when they run into Reina.
5Episode 5Festival Time
24 min
The concert band receives their marching band uniforms and begins marching practice in preperation for SunFes. Things are different now, with the members all more engaged in practice. And SunFes day arrives.
6Episode 6Twinkle, Twinkle, Little Tuba
24 min
Starting this year, the band holds auditions for members participating in the competition. First-year Hazuki has a chance, too. The bass section does everything they can to encourage her.
7Episode 7Crybaby Saxophone
24 min
The band is hard at work preparing for the audition and the competition. Aoi has trouble with her part, to which Taki says, "when will you be better by?"
8Episode 8Festival Triangle
24 min
The band is abuzz with talk about who they'll be going to the upcoming festival with. There's someone Hazuki wants to go with, but that someone is already going with someone else. Meanwhile Kumiko somehow ends up going with you-know-who.
9Episode 9Please, Audition
24 min
The audition for the competition participants has come. Everyone must demonstrate their abilities, whether they're a third-year or a first-year. And then, the results are revealed.
10Episode 10Straight Trumpet
24 min
The band suspects Taki played favorites in choosing Reina in the auditions. Noticing the band's rising distrust of Taki and Reina, he makes a proposal.
11Episode 11Welcome Back, Audition
24 min
Taki-sensei's proposal relieves the upset within the band, and everyone returns to practicing. Reina no longer isolates herself either, much to Kumiko's relief. But then she sees Yuko, who's been antagonizing Reina, speaking with her.
12Episode 12My Euphonium
24 min
The competition's coming up. Kumiko is suddenly asked to play a difficult phrase from a different part. She begins practicing, but...
13Episode 13Goodbye Competition
24 min
The competition performance is "only" 12 minutes long. It's both a blink of an eye and an eternity. The Concert Band members bet their entire youths on this competition. And Kitauji High School Concert Band's performance begins.

Tomoyo Kurosawa
Kumiko Oumae (voice)

Chika Anzai
Reina Kousaka (voice)

Ayaka Asai
Hazuki Katou (voice)

Moe Toyota
Sapphire 'Midori' Kawashima (voice)

Haruka Tomatsu
Mayu Kuroe (voice)
7.3