mc lives as s mage because of circumstances, the story begins with the mc older/strong. His friend took him out to see action and saw an elf being actioned he immediately fell in love with an actioned elf. Now the elf and the mage live together. Basically, this is a very cute love story with a plot and thought out characters!
Maou no Ore ga Dorei Elf wo Yome ni Shitanda ga, Dou Medereba Ii?