Citadel for All: The Only Unit Angel at the Start of the Game - Chapter 600

In novels with a stud there is always a Senior Martial Brother like this:

In the early stages of the novel, his innate talent is high, his cultivation is good, his appearance is handsome, and he has an intelligent, cute younger Martial Sister as a fiancée.

In the middle stages of the novel, he is caught unprepared and defeated by a young disciple (the protagonist) in the sect who’s hardly remarkable at all. From then on, he falls from his godly altar and loses his brilliance. Even his young Martial Sister leaves him for someone else.

In the late stages of the novel, he continues to turn dark, going down the Demonic Path and becoming the major villainous boss. However, the protagonist still ruthlessly defeats him and his soul is eternally sealed.

Once Qin Mo opened his eyes, he discovered that he had become this Senior Martial Brother.

- Description from Novelupdates

After accidentally falling, she actually finds herself bound to a Second Female Lead Counter Attacking System!

Lucas Tanaka, a 30-year-old Japanese man who gave up his dream of becoming a soccer player, lives a monotonous life in Tokyo. After an act of bravery that results in a fatal wound, a glowing screen appears in front of him. [The skill “System” has been granted.] [“System” unlocked.] [The skill “System” has given to you the skill “Supernatural Resistance”.] [“Supernatural Resistance” unlocked.] [Thanks to the divine effect of “Supernatural Resistance”, from now on death is no longer a problem for you]. When Lucas wakes up, he finds himself on a vast soccer field, back in his youth, in the middle of a match with his childhood friend. With new skills and an unexpected chance to relive his dreams, Lucas is faced with the opportunity to redefine his destiny, but first he must overcome the normal challenges of a young soccer player, such as becoming a starter, winning the regional championship and become a professional soccer player! [The hidden function of the skill “Champion System” has been unlocked.] [The skill of “Replicator Genius” has been granted]. [“Replicator Genius” unlocked]. __________ What you can expect: Action, well-developed relationships, an MC who has attitude, a complex system that evolves, an MC who gets really strong, Slice of Life, manga content. The MC is proactive, he knows how to adapt, but he’s not a genius who knows literally every possible future for all his actions.

☆The original novel of Netflix's hit drama Accidentally in Love☆

Chen Qing Qing is the daughter of a wealthy family, desperately wanting to avoid an arranged marriage and find love on her own terms. On the day of the wedding, she flees town and heads out to enroll in the same college where her parents studied, hoping to find out more about their death.

She changes her appearance and name in an effort to hide her true identity and does her best to blend in with her classmates. Her desk-mate in school turns out to be the famous singer, Si Tu Feng, whom she's already had multiple run-ins with. The two don't start off on the right foot, quarreling constantly and causing each other trouble. But could there be more between them?

Thus starts Qing Qing's quest for answers about her parents' death and a chance at real love.