Face-Slapping System - Chapter 7 Physique Enhancement Potion

“Just leave, boy. I have arranged a marriage for you, and she's a stunning beauty. Consider yourself lucky!”With his master fleeing with the money, Lin Chen, filled with sorrow and anger, left the mountain to find his fiancée. However, on the way, he was abducted by a beautiful woman who forced him to pose as her fake boyfriend. The most important thing was, this woman looked exactly like his fiancée.

A world where magic beasts went extinct… until technology revived them!David wakes up in the middle of a Hatching Ceremony in the body of Jethro Merrick, clutching the lowest ranked egg.Now he’s living the life of a poor mechvet’s son, dreaming of adventure as a Riftwalker (think monster taming and dungeon clearing… but with cybernetic beasts!).But dreams crash fast. His egg hatches into a Red Lizard—cute but powerless and only used for pest control. Just as Jethro resigns himself to a boring life, a wrong turn during a Rift Training expedition lands him in a forbidden Rift zone.He barely escapes alive… only to wake up with a supercharged power: he can see the magic and mechanics of every mechbeast, right down to their origins!Here’s the catch: the ancient conqueror who once had this power wants it back, and he’s bringing an army of terrifying mechbeasts to take it.To survive, Jethro must build an army of his own, starting from his powerless frail lizard. But can a pest-control pet (and its rookie human) save the world?Let’s hope so, because our dear world of Nebulon desperately needs saving!

The scum’s or villain’s long road of transformation was tentatively set to the world:
The abandonment of the educated youth’s wife (Completed)
The hidden marriage of the scum film emperor (Completed)
The best brother in the world (Completed)
The Phoenix male who destroy the bridge after crossing the river (Completed)
The treasonous general (Completed)
I’m an honest man (Completed)
To become the top scorer in the School of Agriculture (Completed)
The soft rice man’s self-cultivation (Completed)
The whole world is reborn (Completed)
I want to survive on a desert island (Completed)
The stallion male who has seized the opportunity (Completed)
The perverted self-salvation (Completed)
The spring of the loafer (Completed)
The misplaced life (Completed)
The miser career (Completed)
The ghost is out of feeling (Completed)
The Queen’s favorite husband (Completed)
The vicious girl with her godfather (Completed)
I want to be a good person (Completed)
I does not tear up the family (Completed)
The perverted common plant (Completed)
The Mary Sue’s men (Completed)
Every time I was reborn, someone wants to kill me (Completed)
The old people’s counterattack path (Completed)
The global evolution (Completed)
When I became a net red (Completed)
For you, good person (Completed)
His heart had white moonlight (Completed)

- Description from Novelupdates

Suzuki, an adult programmer, suddenly notices that he’s been thrown into a different world while wearing a casual clothes at level 1. He gained high levels and treasures after using the 3 times use-disposable-magic, Meteor Shower, once. After that he intends to do different world “sightseeing tours”? He meets 3 beast girls, beautiful purple and black haired sisters, and an eccentric blonde haired elf girl along with various people during his trip. Although there are occasional fighting with demons and demon lords, this is a heartwarming fantasy story at heart.