Counterattack System appeared when I'm already At The Mahayana Realm - Chapter 707 - 706: Going Home

Anyone who could construct a stable Spell Model could become a Wizard — that was the Wizards’ ultimate secret! Having been given a new life as the son of an aristocrat and armed with a super quantum computer from his past life, Spell Models came as easily as breathing to Merlin. With this overwhelmingly huge advantage, would Merlin become the greatest Grand Wizard of all time?

- Description from Novelupdates

The strongest Hero in history, Nakamoto Keisuke.

He was summoned to another world in the spring at the age of fifteen years old, and when he successfully defeated The Demon King, he was already thirty-two years old. He had finished his role in another world and returned to Japan, but the reality that had been waiting for him was, “Middle school graduate with seventeen years of blank period” label. He couldn’t find a decent job and had no choice but to spend his days working part-time.

Before such a Nakamoto, a beautiful girl who self-proclaimed had come to return the favor, appeared. “I’m the reward for Hero who had defeated Demon King”, said Angelica, a girl who came from another world that persistently tempted Nakamoto to make her his wife. Together with a high school girl who looks like Elsa, his beloved girl that he lost in another world, Nakamoto with his cheats skills got caught in a harem life.

A person in their third year of high school, experiences the arrival of a divorce comeback system 20 years early. At 38 years old, with a failed marriage, standing at the crossroads of the established and confused years, you recall your young days with your childhood sweetheart. After marriage, you cut off contact and have no more news of her. Re-establishing contact with Xu Qianqian will reward you with 300 RMB. Eighteen-year-old Jiang Nian glanced at the system task on the panel and then at Xu Qianqian living next door, falling into deep thought. Hmm... it seems the system came early. There is another issue: who is the future ex-wife? Hmm... Jiang Nian couldn't hold back. Being eighteen every year, he foresees a divorce in the future. The system issues a task to take revenge on the future ex-wife. Jiang Nian looked at the un-darkened version of the future ex-wife in front of him and fell into thought again. The childhood sweetheart, future ex-wife, and future ex-girlfriend, all appear in their younger versions.

“What kind of guardian would you want to be? the one who destroys everything or the one who protects everything?”

Jason, one of the many casualties during a nuclear explosion gets the chance to reincarnate into another world due to his deeds during the war.

He gets tossed to another world due to ending up with the Shadow god as his patron, something deemed impossible.

With a system to guide him in the world of Clover and a family jinxed through the generations, his adventurous life in new world begin.