Godclads - Chapter 29-16 Back to School (VI)

A series of short stories in the world of Toaru Majutsu no Index organized into chapters featuring Kanzaki Kaori as the protagonist, going around the world and space doing missions for the Church of Necessary Evil, however, there is more than meets the eye as each incident is connected.

One chapter was bundled with each limited edition release of the Toaru Kagaku no Railgun anime DVD and BDs, with all of them together being equivalent to a single normal Toaru Majutsu no Index volume

Witnessing her boyfriend cheating on her with her bestie, Shiyao was so angry that she went to a pub for fun and met a man, who was really a piece of work. After a crazy night she fled away, but was embarrassed to know that the man she slept with was her boss You Ze.
Jesus, give her a break!

- Description from Novelupdates

After she wakes up from being reborn, she becomes the little pitiful girl who is sent into a mental hospital by her biological elder brothers. Her biological elder brothers only dote on the fake young miss, the ‘younger sister’ who is switched at birth. She despises her in any possible way. So, Pei Yunge makes trouble and deals with the fake young miss, waiting for them to tell her to scram. However, the brothers’ attitudes are extremely strange.President Qin sneers. “My younger sister destroyed a shop? Buy the entire mall for my younger sister to trash!”Best Actor Qin raises an eyebrow. “She sent herself to the casting couch? What am I then, dead?”God Qin’s expression is dark. “You repeatedly played tricks and bullied Ge’er. Did you think I was blind?”Pei Yunge: “?”#Scum brothers have days when they’re abnormal too#…After returning to eight years ago, before the Qin family goes bankrupt, the brothers only cares about their biological younger sister that died so terribly because of them. So what if she is talentless and stupid? She remains the apple of their eye, one they swear to protect and love! Just as the brothers take determined steps and find Pei Yunge…“My Yunyun got first place in the world championship again. What a good girl.” The refined and dignified man smiles charmingly.After her real identity is exposed, she is seethes with rage. She grabs the man and bites him. “Don’t even think about humoring me home.”The three biological brothers: “?”#What is with this strange development and wild man#[Doted on by everyone + Identity Reveal] [An extremely cool and foxy boss and a President wolf in sheep’s clothing]