League of Legends: The Bastard Prince of Demacia

Luke transmigrated. The moment he opened his eyes, he arrived in the world of League of Legends—Runeterra, the continent of Valoran! He started with nothing to his name, and an old mother gravely ill in bed—an absolute nightmare of an opening. Yet on her deathbed, she handed him a mysterious necklace. When he brought the necklace to Demacia’s capital, the Great City of Demacia, he was stunned to discover that the father he had never even met was the reigning king! In the blink of an eye, Luke became Demacia’s second prince. His older brother was Jarvan IV, and his uncle was Xin Zhao, the Seneschal of Demacia. With a background like that, Luke suddenly felt that being a slacker prince didn’t sound so bad. On top of that, he also awakened a sign-in system. With nothing to do, he’d sign in, then go tease the blonde girl next door from House Crownguard, and flirt a little with Lady Fiora from the neighboring house. Life like this didn’t seem half bad either. — Description from novelcodex.org