If you're looking for manga similar to Shikizakura, you might like these titles.
Reinhard von Müsel, a poor nobleman's son, one day discovers that his sister, Annerose, has been sold to the royal family. To get her back he sets out to rise quickly through the military along with his friend Siegfried Kircheis.
"Why not press the reset button on your life?" Due to her hideous appearance, Moeko had been hated by both her peers and her family ever since she was a small child. Even as an adult nothing changed, so Moeko resolved to change herself instead. While saving for plastic surgery, she wound up lending money to Ijima, a colleague who had treated her kindly. However, after falling into a physical relationship with him, Moeko learns that Ijima was only using her for her money, and she kills him. She is carted off to prison for her crimes... Then one day, a chance to start over in life arrives: full-body plastic surgery through the "Reset Program." She is offered the choice to cast off her current appearance and live as another, completely different person!!
Coil is a man whose idea of "life" is his alter ego in an online world. A place where the hearts of people come together...and it is not a pretty place. The slender spiderweb that connects their souls within this endless world brings greater pain than reality itself.
Officially, I deal in stocks. My partner, a highly advanced A.I. named Alice, and I constantly monitor current events and search through the news to find information that might be lurking beneath the official story. I’ve had my eye on a particular brand for a while now, and we have been following it closely. I thought things were going pretty well, however… One day, as I was leaving my room, I had the strange feeling somebody was watching me. Turning back to look, I saw Alice’s hologram still active. Usually, she turns herself off before I even get to the door… But today, she just stood there, staring intently at me.
For the search of the Mars Exploration Corps, astronaut selection test begins.