MTL - Shoujo Grand Summoning - ~ 015 Cyclone tube family gas king! How can I not have a housekeeper?

Everyone thought that the most powerful scientist they had ever seen was a national treasure-level scientist until they saw Baizhi-
The light of technology, a cosmic scientist.

Three thousand worlds are different.

In each world, she is keen on scientific research.

This is a story of a scientific researcher who concentrates on scientific research, explores high-dimensional science in various worlds, and refuses to admit defeat and fate. The text is easy to comprehend, flows smoothly, humorously, and the plot is full of ups and downs, and it is full of positive energy.

- Description from Novelupdates

I reincarnated as the villain’s younger sister who will be punished by the male lead. It was a forgone conclusion that both of us will die to the male lead if my older brother continued his evil ways. So I tried to live quietly while trying to change my wicked brother, but for some reason the male lead is lying in front of our villa? I can’t let him die, so at first I helped him up, but…the male lead’s condition is a bit strange.

Wait a minute…did it start already? The male lead’s mana poisoning? There is only one way to calm the enormous amount of mana within the male lead’s body. Immediate physical contact…

But that’s the female lead’s job!

Aren’t I the villain’s sister? Why me?! What the hell is going on?!

“Rose…Please, I need you. Save me…”

This is driving me crazy…I can’t turn a blind eye to the dying male lead, and there’s not enough time to find the female lead!

…Gosh, I don’t know!

Let’s save the male lead first! I’ll help him, then once I find the female lead, we’ll break up! I quietly approached him and we kissed. But as if that alone was not enough, with a deep sigh, he spoke.

“Let’s have a deeper relationship.”

“Deeper…relationship?”

“Kissing, and other things…”

He looked at me sorrowfully. I couldn’t take my eyes off this great beauty when he looked at me in such a somber way. Absentmindedly blinking my eyes, I inadvertently nodded my head. Then he pulled me in and locked his arms. With a dazzling gaze and a bright smile, he spoke.

“Rose, you’re my first.”

No, I can’t be your first time!

The protagonist, Inaka Yuuji, was run over by a truck because his awareness was dulled from overworking.

“Ahー, with this I don’t have to work so much anymore. I want to spend my next life leisurely……”

was the wish Yuuji blurted out. He met God and it was decided that he will be reincarnated in the countryside of the otherworld. He became Alfred Slowlet, 2nd son of a countryside noble. Will he be able to enjoy and leisurely spend his slow life in the countryside?

As if it wasn’t enough for me to be reincarnated as a child in the slums, I was taken to a city of crime and became a test subject. But then, when I saw the man that came to destroy the research institute, I realized that this was the world of an angst-filled reverse harem novel.

While living a relatively normal life after escaping from the institute, the heroine of the novel moved in next door. From the looks of it, I might be the heroine’s neighbor extra. Originally, the heroine was to save the unconscious and fatally wounded villain and in return, be subject to a fanatical obsession.

But, why. Why is the sub-villain collapsed in front of my house?

The sub-villain, Lakis Avalon, was the king of the underworld and the very same frightening man that I had met at the institute before.

“…”

I took a moment’s glance around then I kicked the man’s body away.

You’ve got the wrong house, Villain.