I’m Not the Final Boss’ Lover - Chapter dlc13: DLC: 3 Years of the Emperor Litetia

In a tyrannical world, what is evil? What is benevolence? All living creatures are brutal. Passing through the heaven road to find one’s purpose in life. Struggles to be stronger is not an easy path. The whole journey thistles and thorns, one blade chops open a path, I alone will be supreme!

- Description from Novelupdates

"Bowzer, we'll stop here for the night."

An Individual from Earth finds themselves in the Shinobi World, equipped with a Scientific System. From that moment, he delved into scientific research far ahead of its time.

At the time when every kid, teen and adults dreams revolve around to get training at EX Agency. Ryu Kaisen a 13 years old boy practices for marathon to win prize money and get admission at EX Agency. As he wins the marathon, he is able to get admission at EX Agency with his younger brother Tony Kaisen.As they reach EX Agency the meet their cousin Jin and a new friend Kai. While training they heard about rumors a powerful weapon in cave area of EX Agency by a 16 years old boy named Wei. They solved the mystery of cave by killing the impostor of EX Agency who was about to kill expelled kids of EX Agency. They broke that powerful Weapon. After some day Kai found some weapons from cave area.He gave those weapon as gift his friends, but every weapon was filled with incredible powers in it. As they found out the powers of weapon the monsters tried to attack their world but their friend Wei locked himself in cave with those monsters to save his friends and his world from those monsters.After discovering Wei's sacrifice, the squad rushed to the cave but found neither him nor the monsters. They entered a portal that led them to an unknown world, trapping them. During their search for Wei, Jin was captured by an army and imprisoned. To gain his freedom, he fought and defeated the Royal Guard, who turned out to be an alternate-dimension version of Ryu.Jin served the princess while RG Ryu vowed to help him find his friends. Meanwhile, Ryu, Kai, and Tony searched for Wei, but Tony was captured by his duplicate. Jin rescued Tony, and RG Ryu learned about Jin's SEVPON.After reuniting, they planned to confront the monsters, with Princess Ling Hua joining the fight. Once Tony recovered, they attacked Noxic, the monster controller, but their efforts failed. Just then, Wei reappeared, killed Noxic, and transferred his powers to Jin's remaining SEVPON. Tragically, Princess Ling Hua died in battle, and RG Ryu became prince in her honor. With Wei found, the five friends returned to their world.As the friends entered their world Kai found green gem. He picked it up. They all continued their training and noticed a new boy while admission were close. He ordered to live with Ryu and Tony in their room. He gave them their introduction and told them his name MyungJin.As days moved forward Kai and Tony secretly stole Ryu's sword which was gift from RG Ryu to Ryu. They placed that gem on it but the sword exploded and both sword and gem vanished. As it happened Ryu and RG Ryu's arm got to hot as burning flame so Wei used his magic to save cure them. Also Jin got fever and got admitted to EX Agency's hospital. As Wei cured both Ryus the sword came from their arms. It was the same powerful Weapon they had broke earlier in cave named Black Fire.As Wei and Ryu returned after the cure. They saw Jin's temperature kept increasing. As Wei moved forward to check Jin his eyes turned red and he snatched Black Fire from Wei and exploded whole EX Agency. Wei went to other dimension to call RG Ryu and his army against Jin's beast mode while other managed to keep Jin busy. As RG Ryu's army entered their world they fought against Jin's creature army.While Wei went back in time to meet Prince Wei, Princess Ling Hua's brother to get solution for Jin's condition. They both entered the present time to save Jin and all dimensions. Wei restored the broken Sevpons. The Both Wei with magical power managed to cure Jin and resotore EX Agency. After Battle Prince Wei returned to his time and RG Ryu with his army returned to their Dimension.