The Hero and the Demon Lord's One-Room of Love

In a faraway land, a hero and a demon lord fall in love. Facing fierce opposition, they elope to a one-room apartment in modern Japan. (Source: Futekiya) Note: Includes the one-shot "Shachiku Maou to Stray Sheep (社畜魔王とストレイシープ, Corporate Worker Demon Lord and the Stray Sheep)".