Zeldris has a younger half-brother, Meliodas. Zeldris's friends, King, Ban, Diane and Elizabeth don't know about him. When he moves in with Zeldris, life gets a lot more interesting. Their life gets turned upside down by tantrums, fights, games, girls, bullies and dolls. What's worse than having a younger sibling like that? When your younger brother is a demon, literally.

Meliodas had just started his new school when a girl ran up to him and invited him to her group. But Meliodas has secrets. Secrets he isn't even aware of