Summerstar (サッマスター, Sanmasutā) is a planet located some light years from Earth and is the home planet of Ayako Kuroki. Nothing is known about this planet. This is a reference to the real Kushiwagi Yuki's birthplace of Sagoshima, which is known for it's tropical climate.
| DGTO Empire | Lancastar • Kasumigastar • Baltistar (Vegastar) • Funghistar • Sagittariusstar • Tundrastar |
| Others | Akibastar • Kazakhstar • Eurostar • Uwarastar • Naniwastar • Sebustar • Bananastar • Maiamistar • Okutamastar • Nikkoustar • Summerstar • Saharastar • Atamistar |