Villain: Ultimate Mutation System in the Alternate World - Chapter 64: Tier 4 City

Lynch crosses over to the Wizard World and becomes a Wizard Apprentice specializing in Biological Transformation, armed with a Skill Level system.Thus...He equips a lizard with bat wings, transforming it into a ferocious yet adorable Dragon Attribute creature.He transplants gastric mucosa to the Cannibal Flower to enhance its digestive system.He equips the Poisonous Mushroom with a mouthpiece, transforming it into a Little Spraying Mushroom.Transplanting eyeballs, modifying organs, adding limbs...From a little wizard, he hustles his way to becoming the master of the world, starting from the transformation of low-level Magic Plants until he creates an Angel.

“Future Occupation…Demon King.”

Sai Akuto enters Constant Magic Academy to be useful to society and to become a top-ranked national magician. However, a horrible prediction is made on his first day. Thanks to this prediction, the class representative girl hates him, a girl with a mysterious power embraces him, a female artificial human is sent by the empire to observe him, and his school life is otherwise thrown into chaos…

Huang Dan’s pain nerve is innately different from the ordinary people. A little tore in his skin can cause him to sweat all over his body painfully to the point of him unable to make a word out.

Somehow, he began to cross world, following Mr. System to do the tasks…

In the first world, Huang Dan realizes what it means to die painfully and to live to die again.

TL’s summary:
MC suddenly transmigrated and is bind to a system, requiring him to solve mysteries. Born with a higher degree of pain sensitivity, he met different people in the different worlds and learns what kind of emotion smiling is.

- Description from Novelupdates

Jian rue gazed back at the ugly gray alien while stumbling and running. he clumsily tossed a stone at it “Fuck just leave me alone!!!”Suddenly a warm pair of hand grabbed his waist and tossed him over a study shoulder.“Xing yu!! let me down! you fucker!!!”The said man chuckled and playfully smacked his butt. “Honey, I'm saving your life~”“I had it under control. Now, let me go!” Jian rue bit his shoulders hard until the sweet taste of blood filled his mouth.“Hiss.. baby, you're making me hard~”Jian rue froze. “W-why are you following me! why me..”Xing yu stopped running, and with a swing of his sword, the ugly tentacle alien was slayed. He gentnly pulled him down and hugged him close. Peering into his eyes, he smirked, “Because you are my betrothed,”