プラネタリウム はなかっぱ 花さけ！パッカ～ん 宇宙旅行 OVA

After winning a trip to space at a sketchy festival raffle, Hana Kappa and his friends board a spaceship belonging to Apo and Sol—two aliens from a flowerless planet called Nahanaha. The aliens ask Hana Kappa to use his flower-blooming powers to save their world. As they journey across the galaxy, the group explores the solar system and learns about the constellations in this fun, educational planetarium adventure!