Rebirth in One Piece as Deputy Captain - Chapter 440

The poor Commandery Princess is down and out. Her father died when she was young, and her mother passed away not long ago. Her grandfather, the only one she can rely on, is now at death’s door from his illness. Faced with the merciless uncle, the greedy aunts, as well as cousins competing to present the model of the worst relatives, the Commandery Princess could do nothing but feel depressed in heart.

[No fixed CP + wear books + brain hole cool text + women disguised as men + group pet]

Gu Lan crossed over and became the cannon fodder of the original book disguised as a man, counterattacked the protagonist of the original book who slapped her face, and lived in a dormitory full of sickly beauties.

Until one day, she discovered that her roommates were villains from other horror novels. After discovering the secret, Gu Lan thought she would be killed, but her roommates all looked at her strangely… Contrasted with cute Zhengtai, sickly and beautiful boy, split personality school girl, cold and stern school bully, romantic and noble son who plays Shura every day field.

- Description from novelbuddy

Upon being reborn, she immediately offends a vicious two-faced bigwig.

Earth, 22nd CenturyThe incurable cancer that served as a nightmare for people one century ago is now just a rare but curable disease.With the world’s development, there are now cures for all types of cancer. The Earth is now a planet with no more people suffering from cancer.Except for Zen.Diagnosed with a mutated cancer that was the only one of its kind at an early age, he sank in despair.That was until an opportunity which turned his curse into a blessing presented itself.What power would Zen gain from the disease that plagued him since his childhood?***The art is not mine, all credits to the original artist.