Please Fall in Love with Someone Like Me

"Kobayashi Hana was once a renowned assassin in the underworld, known as the 'Shadow's Black Hand.' After the death of her colleague, she pursued the real culprit relentlessly, eventually killing the 13 enemies who had planned the tragedy." "In the end, Kobayashi Hana settled on the cliff where her colleague had jumped, spreading her infamous name throughout the underworld. She lived out her days in peace and died of old age. Then she was reborn with the memories of her previous life." "Fate brought her to the Warring States era of the ninja, but the cheat character piloting a giant mecha ruined genius Kobayashi Hana's life..." Senju Tobirama, unable to look: ...Is this the resume you submitted to my lab? Kobayashi Hana reminds him: Professor Tobirama, you haven't finished reading it yet. Senju Tobirama sneers: My lab doesn't need someone like you. Get out. Senju Tobirama flashes an evil grin. The heavens fall and the earth cracks, and in the end, Kobayashi Hana forces her way into his lab. But the good times don't last. Uchiha Madara, who has thrown away his forehead protector, targets Kobayashi Hana, and she suddenly appears 54 years after the founding of the Village Hidden in the Leaves. She clenches her fists. "This time, I'll take back everything I lost." Senju heroine reincarnated as an ordinary person (?) x Uchiha Sasuke Medical research: max level. Sealing techniques: max level. I've started writing, but I still don't know what potential landmines there are. The plot won't change much, the logic is messy, and it's a medium-length story. It won't be very long; it's just something to read for a change of pace. Feel free to take a look. Theme: Sweet little story