The Retired Hero is an Extra - Chapter 4 - : Prologue: Surprises

The big guy dresses up as a lonely and old male supporting character, slaps his face and abuses scumbags to fall in love.
small world:
A scumbag male supporting actor who is lonely and old: learning to love with both hands.
The tyrant male supporting role who left the inheritance to the heroine’s son: the family has the throne to inherit.
The deposed prince: what kind of emperor, when the emperor!
Bingshan ex-husband of a book girl: It is impossible to chase after a wife.
The prince of the enemy country who retreated for the heroine: step on the capital and rule the world.
The pet girl mad demon of the group pet text: I pet myself.
Edible Guide: Quickly cross the routine, capitalize the romance! One cp in one world, if you change the world, your feelings will be eliminated. If you don’t like it, don’t enter. 

Content tags: face slap
Search keywords: Protagonist: Dongchen ┃ Supporting role: My concluding article “The Male Protagonist Doesn’t Follow the Plot [Quick Pass]” “Someone Wants to Take My Gold Finger [Quick Pass]” ┃Others:

- Description from novelbuddy

A kind girl falls in love with a vicious killer. Unhinged Yuri story set in Seoul.------“Like a prey waiting with a trap, I missed my predator.I missed her touch in the places I’ve never been touched.I wanted to hear her sing the songs that I’ve never heard.”------As the blood dripped off the knife she held firmly in her pale hand, I saw my reflection in the cold blade that had just taken the life of a man.I dreamed of magical moments like this every day.Something - someone to come and free me from the suffocating monotony of normalcy.She stormed into my life brandishing death, and in the moment of madness, my heart fluttered.Then she came to my place, uninvited. I treated her wounds and fed her. She slept on my couch like a cat. We started our lives together. Death bound us like the knot of tie I fixed for her as she left for work - to kill, kill, and to kill again.I spent countless nights sitting in darkness, on my couch hugging my knees, gripped with worry and excitement. I prayed for her safe return home, but I did not pray for the souls she’d be sending to hell.But she always returned, like a stray cat coming for food in the back alley behind a restaurant. I was the cook who put out the food for her, stroked her, and gave her shelter.A stray cat. A great feline predator. She was mine and mine alone.Together we laughed, alone I cried.Together we laughed, alone I cried.But I think we also loved.I think.------This is a dark and twisted psychological slice-of-life romantic comedy with a sprinkle of inspiration from the noir genre. If that doesn’t make sense, it’s because it doesn’t.

Orphaned at the mere age of seven and thrown out on the streets with no place to go. Kana lived the life of a street rat. She did what she could to survive from digging through the trash and stealing what she could. But even after almost ten years of surviving, her life still ended short.

Su Xue, a woman in her mid 20s, is struggling both in paying rent and finding her path in life. Her latest stint has her trying to become a popular League of Legends streamer, though to poor results. One day, she is interrupted in the middle of a livestream by a surprise visit from her landlady. She is informed that she will be having a new roommate. The landlady’s nephew, Lin Feng, a 18 year old boy who has just transferred over to Shanghai for his last year of high school.

Though initially opposed to it, Su Xue reluctantly agrees to the arrangement. She learns that the two share a common interest—League of Legends—and that he’s really amazing at the game. Lin Feng also reveals to her he wishes to become the best professional League of Legends player in the world.

The next day. Lin Feng attends his first day of school as a transfer student at High School 13. He meets Ouyang and Yang Fan, and the trio find a common passion in League of Legends. Lin Feng is then introduced to Ren Rou, the president of the esports club with a fiery personality, and Tang Bingyao, a quiet bookworm with a love for money and a surprising talent for the game.

A little about Lin Feng’s past is revealed. He was a once pro player, the youngest in history and a contender for the best player in the world. Until the finals of the Season 1 World Championship. There, he lost to his arch-rival, an equally brilliant Korean youth. That was the peak of his career, and also the turning point in his life. He stepped down from his team and disappeared from competitive play altogether. Now, after a four year long hiatus, he aims to make a comeback

Over the next couple of weeks, Lin Feng learns about the upcoming Shanghai 16 School Tournament, and that his school’s esports club had performed especially poorly the previous year. He agrees to coach the club’s team and help them win the first place trophy this year. And so, he starts the members of the club out on an intense training bootcamp.

Meanwhile, the Season 5 League of Legends World Championship is taking place at around the same time. Tian Tian, one of Lin Feng’s former teammates and best friend, is on one of the Chinese teams playing at Worlds. After a poor showing, he is on the verge of a mental breakdown. Lin Feng witnesses everything in a viewing party with the esports club members and becomes worried.

On the day of the Shanghai 16 School tournament, Lin Feng reunites with Tian Tian on the phone. He tells Tian Tian he’s going to return to the professional scene, that he’s making a new team and plans to invite him. But Tian Tian has to vow not to give up at Worlds and keep winning. Tian Tian agrees, and Lin Feng promises he’ll fight alongside him. Lin Feng then heads into his match with renewed resolve, to climb from the bottom all the way back to the top, and overcome the rival that defeated him so many years ago.