After traveling through time and reincarnation as a demon, he also has a master who claims to be a superior demon, Rias, who often attacks him at night; Himejima Akeno, who is also a servant, always wants to reproduce with him; in order to avoid physical exhaustion and to survive, he works hard to improve his strength. Can you become stronger by signing a trade contract with humans? Then sign it! Mai Sakurajima, the quintuplets of the Nakano family, the killer Yoel, Kato Megumi... all sign it! In order to live a peaceful daily life with his harem, Long Yi, as a demon, said that he still needs to work hard, either to be "invincible" in the world, or to be "invincible" in the world.

If you want to support me and read the chapters earlier, you can visit my website.
akenohimejima.com