Zhaohuan Wansui

From Shiroyukineko Translations:
The Soaring Dragon Continent is a world of summons, you can only become strong if you become a summoner! Yue Yang, an average high school boy, was suddenly sucked into a wormhole and brought to the Soaring Dragon Continent. When he woke up, he was greeted with a lot of worried faces and found out that he had assumed another person's identity. Turns out he's the good-for-nothing son of the Yue Family, who had just recently drowned himself because of a failed engagement. Mysteriously, Yue Yang succeeded in summoning a monster on his first try, even when his previous self couldn't summon a single thing for eighteen years. Monsters simply listened to his orders and agreed to form contrac...