Long Live Summons

Briefly about Zhaohuan Wansui manga:

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, suddenly went through a wormhole and was transported to the Soaring Dragon Continent. When he woke up, he found out that he had assumed another person’s identity. Turns out he’s the good-for-nothing son of the Yue Family, and 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 identity had never summoned anything before.