Zhi You Wo Neng Yong Zhao Huan Shu
The Ultimate Summoner·只有我能用召唤术
A character named Zayn Ze moves to a parallel universe where individuals gain strength by battling monsters in the Demon Realm to stop an invasion of the Summer Nation, the world he calls home. To safeguard his sister Nina, he enters the Demon Realm using the name "Loki." There, he unexpectedly activates a rare and powerful SSS-level Summoning Skill. This ability lets him summon and control all monsters he defeats. As his skill improves, it becomes a crucial advantage in the perilous environment.