Supreme Alchemist - Chapter 3 - : A Three-Month Agreement

In the era of interstellar warfare, every melee mech will be paired with a long-range sniper mech to cover the battle.
The sniper mecha master Yan Xueshan (beta) and the melee mecha master Arthur (alpha) are just such a pair. The two have been together for six years.
The upcoming Armageddon is a near-death battle.
the day before.
Yan Xueshan: “Remember to write a suicide note in advance.”
Arthur said frustratedly: “I have only one regret. If I die this time, I will be a virgin until I die.”
Yan Xueshan snorted coldly: “…no promise.”
Arthur asked pitifully, “Master, can you fulfill my dying wish??”
Yan Xueshan: “?”
How absurd.
But Yan Xueshan thought about it, this is his comrade-in-arms, whose life and death intersect, chastity counts as a p- OK, I agreed! !
However, after the Armageddon, none of them died.
Not only did they become war heroes, Arthur also turned into a federal prince.
Arthur took out the marriage application, just one signature, and said honestly and faithfully: “Master, didn’t you say that you will go back to get married and retire after this battle? You help me fulfill my wish, and I will help you fulfill my wish too!”
Yan Xueshan: … something seems to be wrong?

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- Description from novelbuddy

Haruto Saito, was playing a mobile game called “King of Cards” when his phone exploded due to overheating. He then transmigrated into the world of Naruto and found out...Why can I see the name, identity, and reputation of each of them?Killing hostile ninjas will drop cards? Ninjutsu cards! Taijutsu cards! Forbidden jutsu cards! Mystic jutsu cards! Can cards be eaten? Will you gain corresponding abilities after eating them? What are equipment cards? Killing Uchiha clan ninjas can drop Sharingan bloodline cards? Killing Hyuga clan ninjas can drop Byakugan bloodline cards? What if I kill Kaguya? ! !Naruto world is gamified! Reputation exchange! Ninjutsu enhancement! Achievement rewards! Unlimited first kills!“Excuse me, I'm not targeting anyone, I just say that everyone here is garbage!” At the Five Kage Conference, Haruto Saito said lightly, tapping his fingers on the table.

After getting shot, Lucas, a serial killer, reincarnated into the novel world as a tragic villain with the same name, Lucas Ciffer.

Lucas Ciffer was supposed to be the Holy Kingdom's successor to the throne, but his demonic appearance and the powers he possessed terrified the entire kingdom. A white-haired boy with red eyes and pale skin, together with his dark powers, got persecuted and exiled by his own family. Not to mention that in the future he was destined to die by the hand of the hero.

Lucas fell from holiness, and, with the serial killer's bloodlust and knowledge of the future, he decided to prove the world right.

Yes. I could be a villain; no, in fact, I WILL BE THE VILLAIN.

“From today onwards, you will become the Envoy of one of the Main Gods in the Dimensions of Gods. You will travel from one world to another and through that, you will attain what others will never obtain in their entire life.”