Kyoukai Senjou no Horizon – Kimitoasamade - Volume 2A, Chapter 12: Measurer of Rank

Waking up again in his seventh reincarnation, prince Jing Beiyuan found himself back in time, when everything had yet to be set in motion. Having been given a second chance, Beiyuan had to survive court and decide whether it was finally time for him to let go of his feelings; all while trying to handle the youthful, innocent force of nature who had suddenly barged into his already complicated life.

- Description from Novelupdates

Diane's life crumbles when she discovers her husband Liam's affair with her sister Sophie. Betrayed and heartbroken, she retreats to her friend Joan's beach house, seeking solace. But as plans for revenge take shape, Diane uncovers darker secrets and hidden agendas. Pregnant and determined to protect her future, she embarks on a journey of survival, retribution, and unexpected alliances.

It is the year 2050, One of the world’s greatest assassins had fallen. Will his successor continue his legacy?

Many people wish to become a character in a novel they like. Side characters are the best ones to reincarnate as. And Ceaser was the same. However, the problem is, the person he reborn as, was supposed to die at that time when Ceaser appears in the fantasy world. The childhood friend of the main heroine, who was supposed to be a stepping stone for the main lead so she can grow stronger. However, now that Ceaser was in that person’s body, naturally, he couldn’t let himself get killed just after rebirth. But what consequences will he bring by staying alive? And what awaits near the end of this story, about which even Ceaser is unaware?