Falling for my Enemy's Brother - Chapter 36: When walls fall

Douluo Continent, Star Luo Empire, Star Luo City.In the finals of the All-Continent Advanced Soul Master Academy Soul Dueling Competition, Liu Xing looked coldly at Shrek Academy's last hope on the opposite side and said, “Huo Yuhao, Wang Dong, surrender now, and no one will get hurt.”High above Shrek City, Liu Xing stared at the Radiant Holy Dragon soaring into the sky and said in a deep voice, “Ten thousand years of Shrek, today you will be erased.”Facing the Sea God Tang San, who had illegally descended to the lower realm, Liu Xing's voice was like a chilling wind, icy and bone-piercing: “Sea God Tang San, you have violated the law and recklessly interfered with the lower realm. You are courting death.”Hearing this, Tang San was momentarily stunned. Why did these words sound so familiar?••••There is only one single female lead for now but there are many female characters who will have feelings for mc.••••

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.

Her ex-boyfriend was snatched by her step-sister. Not only that, she accidentally lost her virginity to him due to her step-sister’s schemes.She was nearly confined to her home until he came along. He rescued her from that nightmarish place, if that place can even be called a “home.”He, dashing and powerful, seems to have everything. Yet he suffers from an odd illness where he feels nauseated whenever a woman is within three meters of him. She, however, is an exception. From that fateful day on, their paths cross. He strives to win her heart, and she, too, starts to develop feelings for him.But as the story unfolds between the two, her ex-boyfriend’s growing mixed feelings and the appearance of his fiancée threaten to put an end to the budding love between them…

I originally thought this was a world like an ordinary urban novel…Drawing comics by myself, traveling is pretty good.
But tell me, what happened to this magician called “Emiya Kiritsugu” who jumped on my face?
Who changed the settings?
Currently involved in the content of “F/Z”, “F/SN”, “Fantasy Carnival”, “The Emiya’s Meal”, “The Holy Grail of the Imperial Capital”, “FLA”, “Elmello II Event Book”, “FGO”, “FE”, etc.
Others related to “JOJO’s Bizarre Adventure”, “Rebellious Lelouch”, “Persona 5”, “Attack on Giant”, “Death”
“FGO”, “FE Series”, “FA”, “FSF”, “Cangyin”, “Magical Girl Illya” will be involved next…

- Description from novelbuddy