Opening and closing Songs[]
Opening[]
- "Morning Arch" by Marina Kawano (TV)
- "Balloon Theatre" (バルーンシアター Barūn Shiatā) by Marina Kawano (OVA)
Closing[]
- ""Humming Girl" (ハミングガール Hamingu Gāru) by Aoi Yūki, Kaori Fukuhara, Minako Kotobuki and Yumi Uchiyama (TV)
- "Smile Equation" (スマイル方程式 Sumairu Hōteishiki) by Aoi Yūki, Kaori Fukuhara, Minako Kotobuki and Yumi Uchiyama (OVA)
Insert Songs[]
- "Chemistry of a Spring Breeze" (はるかぜの化学 Harukaze No Kagaku) by Kaori Fukuhara, Aoi Yūki, Minako Kotobuki and Yumi Uchiyama (ep. 1 )
- "Start" by Kaori Fukuhara, Aoi Yūki, Minako Kotobuki and Yumi Uchiyama (ep. 2 )
- "I Want to Hold You Tight" (ぎゅっとして欲しいんだ Gyutto Shite Hoshiinda) by Aoi Yūki (ep. 3 )
- "Summer Day Syndrome" by Kaori Fukuhara (ep. 4 )
- "Mermaid Sisters" by Minako Kotobuki (ep. 5 )
- "Let's Explore!" (たんけんのススメ Tanken No Susume) by Yumi Uchiyama (ep. 6 )
- "Summer Breeze" by Minako Kotobuki (ep. 7 )
- "Tea's Melodical Beauty Bang Bang" (オチャメロディカルビューティーバンバン Ocha Merodikaru Byūtī Ban Ban) by Kaori Fukuhara (ep. 7 )
- "One Night's Love, One Night's Dream" (恋一夜夢一夜 Koi Ichiya, Yume Ichiya) by Yumi Uchiyama (ep. 7)
- "Friends" (ともだち Tomodachi) by Kaori Fukuhara and Aoi Yūki (ep. 7 )
- "Your Hand" (君の手 Kimi no Te) by Daisuke Ono (ep. 7 )
- "We Don't Have Wings" (翼はないけど Tsubasa wa Naikedo) by Kaori Fukuhara and Aoi Yūki (ep. 8 )
- "Sweets Time" (オカシナ時間 Okashi na Jikan) by Kaori Fukuhara, Aoi Yūki, Minako Kotobuki and Yumi Uchiyama (ep. 9 )
- "Happy Snow" by Kaori Fukuhara, Aoi Yūki, Minako Kotobuki and Yumi Uchiyama (ep. 10 )
- "Surely, Always, More" (きっと ずっと もっと Kitto Zutto Motto) by Aoi Yūki (ep. 11 )
- "Unidentified Flying Girl" (未確認飛行ガール Mikakuninhikō Gāru) by Minako Kotobuki and Yumi Uchiyama (ep. 12 )