Park Jimin, or better known as Gravitar, is a superhero from the streets of Seoul, Korea. He is widely acclaimed and lives by stopping thieves and villains every day, while hiding his secret identity.

Park Jimin is one of God's pure angels. At an event in heaven he meets an angel, becomes friends with her and ends up falling in love. But there is a problem, it is a serious sin, angels cannot fall in love.