Shachiku no Ore, Dragon ni Natsukareta node Pet Haishin wo Hajimemasu: Chibikko Dragon to Monster Bokujou Life

Decades ago, a dungeon suddenly appeared in Japan.
Monsters emerged from the dungeon, causing chaos, but thanks to countermeasures implemented by various countries, the threat was greatly reduced, and the world that was once called fantasy became reality for people living today.
Living in this reality, Makise Joji is exhausted from his unreasonable boss and endless overtime work, and on his way home, he picks up an injured and weakened baby dragon.
Joji names the dragon Ohagi and posts a video about it, which instantly becomes a huge buzz and attracts attention.

(Source: Gaugau Monster, translated)