MTL - Start with Batman - Chapter 310 lightning star

Qi Laiyan was a tycoon worth billions. Due to a special gene in his body, he possessed a body that never got sick.But he could only live to 50 years old.After his death, half of his estate would belong to his contractual wife.One day, Qi Laiyan, whose body had never had any issues, suddenly started coughing.His darling wife, who loved him desperately and only cared about the man not the money, rushed to the hospital in the freezing wind, grabbing him and crying until she was a tearful mess.“Why did you suddenly start coughing, honey! What will I do without you?!” She cried hoarsely, so despairing.Qi Laiyan looked at this scene he had anticipated long ago, feeling nothing but annoyance.Just as he was about to chase the woman away as usual,A voice suddenly rang out in his mind.[Good boy, is this coughing? This is hitting the jackpot for me!] [How will I live? Of course by inheriting your assets and dancing on your grave after the seventh day following your death!]Hearing this voice identical to his teary-eyed, soft-gazed yet desperate little darling wife, Qi Laiyan fell silent.Unsure, listen further…

I exist in the darkness, disappear under the bright light, and will eventually devour the sun and turn into the shadow of all things… Known by people as the indescribable terror of darkness; the king of shadows; the dark day; the existence of the shadow of the world , is still just a somewhat special high school student, facing a weird death game…

- Description from novelbuddy

Wang Xiao was compelled to descend from the mountain by his master, with his intrinsic energy cloistered, and a lovely woman erroneously believing him to be her betrothed. In a bid to safeguard his mistakenly assigned fiancée, he resolved to remain in the school teeming with enchanting beauties. With the same intent to defend his intended, he managed to transform the currents of power within the city.

Lin Jie, a transmigrator, is the owner of a bookstore in another world.