After discovering her younger sister in bed with her fiancee, Chu Hanyu died by suicide in a fit of grief.
The System caught her and dragged her into the mainframe space, where it gave her a scolding:
[How many times has this happened now?! Why can't you make her fall in love with you? Why are you so useless?!]
At last, Chu Hanyu remembered that she was a quick transmigrator, caught in an endless cycle as she searched for the pieces of her lover scattered across various small worlds.
Her mission was to make the protagonist of each cycle fall in love with her, then willingly cut off the body part that belonged to her lover and give it to her.
But no matter the setting or the relationship, she would be bewitched by the character her lover had become, turning into a pathetic simp who gave everything and ended up with nothing.
So Chu Hanyu decided to return to every cycle and start all over again.
*
World One
[The Older Sister in a Widowed Sister-in-Law Story]
This is a world of transgression.
Taboos, desire, and moral decay.
But none of it has anything to do with Chu Hanyu.
She's just an older sister who saw her younger sister seduce her fiancee, then jumped to her death while everyone cheered them on.
*
World Two
[The Losing Love Interest in a Harem Love-Investment Story]
At first, Chu Hanyu was a popular childhood-friend stock.
Until two women with wildly different styles showed up out of nowhere. Caught between a madwoman and a yandere, Chu Hanyu faded into the background completely.
Desperate to win back the protagonist's heart, Chu Hanyu even threatened to kill herself. But all she got, at the very moment her life ended, was a single "I'm sorry" over the phone.
*
World Three
[Zombie Apocalypse]
When the zombies came and people with supernatural abilities were everywhere, Chu Hanyu, who had no powers at all, could only flee from place to place with her wife.
At a moment of crisis, a beautiful, formidable captain of a superpowered squad saved them and brought them back to camp.
Chu Hanyu recognized her as the goddess she had secretly loved since her school days.
But later, the goddess fell for her wife.
*
World Four
[Master and Disciple]
This is a story everyone praises: a cool, aloof immortal Venerable rescues a child in distress from the mortal world and lovingly raises her. She becomes the child's master. Once the disciple grows up, she confesses her love. Her master first resists, then falls for her, and in the end they become partners.
Unfortunately, Chu Hanyu is neither the immortal Venerable in this story nor the disciple.
She's just a fox spirit the disciple picked up along the way.
[White Moonlight Substitute]
[Western Fantasy World]
...To be decided
The protagonist is universally adored. All worlds are female by default.
(The original host in each world is the protagonist's past life. Their personalities differ because they grew up in different environments and backgrounds.)
Theme: After all that, I still have to piece it together myself