A Most Unlikely Hero, Volume 3: A Sci-Fi Harem Light Novel

Alexander S. Ryker is now a marriage candidate to Gabrielle Angelise, the princess of Angelisia and daughter of King Lucifer, who rules over most of the galaxy. Of course, he's only her marriage candidate because Gabrielle is pretending to love him. For the sake of her freedom and continued happiness, he's decided to play along.
Unfortunately, his decision has once more cost him-several billion credits worth of damage to Mars' City's dome, which protects the citizens from the harmful atmosphere. The only way to pay it off is to spend time with one of the only people he hates more than anyone else: His uncle, Nicolas Ryker.
The shenanigans of a wannabe hero and a bodacious alien princess continues in A Most Unlikely Hero Volume 3!