Summon Night 4

The protagonist is a teenager who lives as a Inn keeper in Traiul, a town in the Empire. During a meteor shower, a giant egg falls next to the lead, reveling a baby dragon inside it. The dragon does an imprint and start thinking the protagonist is its parent. The protagonist adopts the dragon, but a mysterious group is also after the baby. He eventually comes to know that the baby is actually the reincarnation of a dragon god, – the protector of all summon beasts. (Summon Night wiki)