Oops, I had a ONS With My Secret Ex-husband - Chapter 79 Strong

The mysterious boy Ling Chen is saved by a little girl as he lay on the street dying. Years later, he strikes a deal to save this savior-turned sister and enters the virtual world. In a future Earth where advanced warfare has forced nations to settle issues virtually or else suffer the consequences, Ling Chen bursts into the scene and goes from unknown to legend. Yet all is not as it seems, for Ling Chen has a dark past, and there is a greater mystery at hand behind this virtual world.

To save his terminally ill little sister, Ling Chen enters the newly released virtual game world and joins a small gaming studio comprising entirely of women. From now on walking upon his path towards the pinnacle. An ancient, evil item almost forgotten by history, the “Lunar Scourge” helps forge his unsurpassable legend, and causes him to unknowingly step upon a path that is destined to be punished by the heavens, the way of the Shura.

- Description from Novelupdates

Xia Wan entered an ancient Mary Sue campus novel and became a cannon fodder female supporting role who had a marriage contract with the male protagonist F1.
F1 thinks she gets in the way because he likes the heroine.
Because F2 has a crush on the heroine, he thinks she is superfluous.
F3 finds her troublesome because she needs a female lead.
F4…I’m still working as an exchange student abroad, so I won’t be able to play for a while.
In order to avoid becoming a suspect in the future.
On the first day of transferring to this school, Xia Wan stood on the podium and introduced herself, “Hello everyone, I’m Xia Wan’s younger brother!”
*
The system told Xia Wan that there are two ways to live, to gain love or friendship from F4.
Xia Wan chose the latter without hesitation.
On the first day of disguising as a man, Xia Wan gave water to the grumpy F1, and a rainbow fart output touted his skills as a dog.
On the tenth day of disguising as a man, Xia Wan helped the gentle school god F2 avoid his crazy suitors.
Fifteen days when she disguised herself as a man, Xia Wan gave the dandy F3 sincere care and help.
…
When F4 returned to China, he found that the position that should have belonged to him had been replaced by someone.
And his three close brothers fought over who was Xia Wan’s best friend.
F4: ? ? ?
#Our F4 seems to be over#
Xia Wan:OAO
#What do you see me doing? I don’t know anything! #
Thanks for the cover @salt lemon.

【Reading Guide】
No CP in the text, single arrow for all staff, friendship to a happy ending
Fanwai 1v1 has a male protagonist.
For details, see the words in Chapter 1, which can be accepted and read again.

Content tags: Wearing books Women disguised as men
Search keywords: Protagonist: Xia Wan ┃ Supporting role: Who do you love ┃ Others:

- Description from novelbuddy

Being adored by one's parents and hoping to achieve something that could bring them happiness, a child sacrificed their carefree personality and chose the path of books and knowledge at an early age.Without looking back to see how those they thought were their parents were, in truth, only pushing them from behind.Esme, a prodigy from an early age, excelled in everything, unlike her sister, who, though adored by both parents, always lagged behind.Finally, after saving the company from debts and restoring it to its former glory, Esme looked back at her parents in hope of recognition but...“You are not even my daughter, you pathetic fool.”“Hehe, Sister, how about I take your fiancé?”“Um, you see, Esme, I love your sister.”“Tch, insect, how dare you reject checks whenever I, your mother, asked for money!”Those words lingered in Esme's mind before she lost consciousness and woke up inside a prison.“What are you doing here, Aron?” Esme looked at a handsome young man seated in a wheelchair, gazing at her with amusement. He was her sole business competitor, and now, he was visiting her in prison.“Nothing, just came here for a proposal, Miss Esme...”Let's see what awaits the journey of an heiress who was wrongly accused of being fake, betrayed by her fiancé, and had to seek support from her business rivals.

It was only after Su Yayan's death that she realized that she was a malicious cannon fodder female character who became a scapegoat in a Mary Sue story.