Rewind System: Vampire Harem In The Apocalypse - 66 Chapter 66

Betrayed and butchered by his treacherous best friend, Carlo's soul was consumed by an insatiable thirst for vengeance. Reincarnated into the body of Eduardo, a lowly servant, he vowed to dismantle the ruthless Mafia empire of Marcello Diabolo, the monster who orchestrated his brutal demise.But plans went awry upon meeting Marcello.“You're mine, Eduardo. Why don't you spread your legs for me”Eduardo's resolve wavered as Marcello's seductive pull intensified.“Run, and I'll catch you. You'll never escape my bed” Marcello warned.“I need you inside me, not once, not twice, do it until I break”Torn between revenge and desire, Eduardo's secret threatened to expose him. Would Marcello's obsession endure, or would Eduardo succumb to his enemy's passion?Will Eduardo's quest for vengeance consume him, or will Marcello's fiery passion reduce his resolve to ashes?

In this story, a regular guy from our world becomes a young Main Branch heir of the powerful Hyuga clan in the Naruto world.He's primarily interested in gaining more power and doesn't care about right or wrong. He uses his knowledge from Earth and the Naruto show to get ahead, using his creativity and intellect to the utmost.As he tries to become more powerful, we see sides of the Hyuga clan and ninja world that weren't shown in the original Naruto story.He looks into the secrets of his ancestors, the Hyuga's eyes, and how ninja politics work, finding out things we never knew before and that the original author left unexplored.However, gradually, along the way, he also meets new lovers, friends, subordinates, and enemies and challenges how things are done in the ninja world - and also tries to unify it in the process and bring real peace around.

You take up a student career.

Student career upgrade to lv.7

Acquired skills: primary school knowledge, junior high school knowledge, high school knowledge.

You take the college entrance examination,

You got a perfect score.

Your basic occupation has been upgraded to lv.9, and the job transfer system has been activated.

You change jobs to become a scientist, you gain R&D skills

You use research and development skills to get space fortress construction technology

You use R&D skills to gain starship technology.

You are invincible.

- Description from novelbuddy

A side story series featuring the girls of Kyoukai Senjou no Horizon.