Deadbeat Hero

Na Gangnam has been unemployed for years, mooching off his poor mother. But one day, he suddenly decides to become a good son starting tomorrow. As he sleeps, he's awakened by a loud noise and opens his window… only to find a slime in front of his house! He ends up getting thrown into a fantasy world along with his entire house. Gangnam's journey back home—I mean, back to his mother—begins now. (Source: Mangaku)