After the Male Lead of a Tragic Romance Awakens

Not traditional quick transmigration: only the System transmigrates, and the protagonists differ in every world. [1v1, sweet romance, both leads are emotionally and physically faithful]

One day, the Space-Time Administration came under an unknown attack, and all the male leads in the angsty romance stories who were supposed to follow their plots awakened. After that, many small worlds broke free of the Administration's control. The Administration sent System 186 into these worlds to guide them back to normal. While carrying out its missions, intentionally or otherwise, System 186 turned every angsty romance into a sweet love story.

(1) A timid, withdrawn girl x a talkative, short-tempered demon king (currently being revised; the first 14 chapters are available)

To save the Demon Realm, which is about to lose its sun, the Demon King summons a girl from the real world who has autism.

(2) An innocent mermaid and a domineering CEO who transmigrates through a thousand years

The CEO accidentally reads his younger sister's manga, falls in love at first sight with the beautiful mermaid supporting character, and transmigrates into the tyrant who shares that character's name.

(3) An aloof, cold senior sister x a hypocritically nice junior brother

The Sword Sect's senior sister and her junior brother have never spoken to each other. Then one day, their fellow disciples are astonished to see the junior brother following the senior sister around, fawning over her.

(4) A vain, money-loving village beauty x a domineering educated youth sent to the countryside

Pingyang Village is an ordinary village. One day, a group of educated youths arrives to live and work there, and the village beauty quietly sets her sights on the one who looks the richest.

(5) An amnesiac, lively cat demon x a corrupted, obsessive demon hunter

The demon hunter ranked first among those who despise demons finds himself accompanied by a demon one day.

(6) A stunning Republican-era substitute x a cold, ruthless young marshal

(10) An angsty romance heroine who runs away while pregnant x someone plagued by terrible luck