Hugging the World's Most Beautiful Younger Sister While Sleeping Somehow Turned Her into a Yandere - 01 - The Most Beautiful Little Sister in The World

“Today, too, she’s the most beautiful in the world.”

Aoi Usami headed to the living room after waking up, and there, in her school uniform, sat her younger sister, Runa, on the sofa. Without hesitation, Aoi hugged her.

Her silvery hair, smooth and nearly white down to the lower back, a beauty resembling a jewel with large, beautiful light pink eyes framed by long eyelashes, flawless snow-white skin, a small face, slender legs, and an above-average chest, all constituted a mysterious and perfectly balanced appearance.

When Aoi first met his sister due to their father’s remarriage, he couldn’t help but fall in love at first sight. Of course, it wasn’t romantic love since she was his sister, but Aoi loved Runa, considering her the most beautiful person in the world.

However, due to Runa’s overwhelming beauty, Aoi became a severe siscon. He would prioritize his sister over anything else, neglecting other matters just to focus on her. He particularly liked her hair, eyes, and skin, and Aoi took care of Runa’s hair every day.

“Nii-san… The skinship is intense even in the morning.”

With a rubbing gesture on her cheek from the beginning of the day, Runa looked slightly perplexed, but her mouth relaxed. If she genuinely disliked it, she would resist, and it was apparent that she didn’t mind the sibling skinship.

“Isn’t it fine? We can’t be together at school.”

“Because we’re in different grades.”

Although they attended the same high school, Aoi was in the second year, and Runa was in the first year, so they only had time to be together during lunch breaks. Aoi wanted to visit her every break, but it was understandably embarrassing, and she declined.

“If that’s the case, I’ll stay behind a year so we can be in the same class next year.”

“We won’t be in the same class as siblings, so please don’t stay behind a year.”

Indeed, even if they were twins in the same grade, they heard that they would be placed in separate classes.

“Anyway, let’s eat breakfast. Today, I made sandwiches.”

Since their father had been overseas on a business trip with their mother since spring, Runa prepared their meals.

However, Aoi didn’t particularly want Runa to do household chores.

This is because Runa has a congenital genetic disorder called albinism, where she lacks melanin pigment from birth. Due to this condition, she is sensitive to substances like chlorine in water, light, ultraviolet rays, and detergents.

Merely exposing her eyes directly to flashlight light can risk blindness, swimming in a pool causes her skin to blister, and prolonged exposure to sunlight during summer can lead to sunburn for Runa.

In exchange for her excessively beautiful appearance, ordinary things that are safe for most people become dangerous for Runa. She has to observe and not participate in activities like swimming in the pool and outdoor physical education during the summer.

Due to the need to be cautious about ultraviolet rays during the summer, from today, June 1, they switch to summer uniforms with short sleeves. However, Runa wears a long-sleeved school shirt. She tends to dress relatively thick even in summer, with long sleeves on top and tights underneath, unable to wear light clothing like others outdoors.

“If you think so, then brother, please wake up early and get ready.”

Even as she’s hugged, Runa gives Aoi a disapproving look. Indeed, if Aoi wakes up early and takes care of the household chores, it would be fine.

“I’m not good with mornings…”

Aoi is confident that he can do anything for Runa, but waking up early is the one thing he struggles with. Although he wakes up early enough to avoid being late for school, waking up early for household chores is something he can’t manage.

“Don’t be so down. I like cooking, and I wear vinyl gloves, so there’s no problem even if I touch water.”

“I’ll check to make sure.”

Worried about any blemishes on her beautiful skin, Aoi takes Runa’s hand and carefully inspects it. Fortunately, her hands are as beautiful as usual, giving Aoi peace of mind.

“Nii-san, you really are an overly worrywart.”

Runa sighs with an exasperated expression. Aoi is aware of his tendency to worry, but there’s a reason he can’t help but be concerned about Runa’s well-being.

“I don’t want you to end up like your father.”

While Aoi hasn’t met Runa’s blood-related father directly, he knows that Runa’s father passed away early. The cause of death was skin cancer, and he was also an albino like Runa.

Albinos, with their low melanin pigment, are more prone to skin cancer due to the effects of ultraviolet rays compared to others. That’s why Aoi is concerned about Runa. Even though she’s a teenager, and there’s UV-cut cream available, there might be no harm in worrying too much.

Despite being a pure Japanese, Runa inherits albinism from her father, resulting in white hair, white skin, and red eyes.

“Shall we do the usual check before eating?”

“Do we need to do it every day?”

“Of course.”

Blushing and looking embarrassed, Runa nodded slowly. She used her hand to push her long hair aside, turned around, and exposed her back to Aoi.

Aoi slowly lifted Runa’s school shirt to reveal her back. Of course, the curtains were drawn, so there was no issue with the unhealthy-looking pale skin being exposed to sunlight.

“As usual, your skin is beautiful.”

After inspecting every corner of her back, Aoi puts Runa’s shirt back in place. It’s not just to see her beautiful skin; he’s checking the part of her back that she can’t see on her own. While the back is less exposed to sunlight due to the clothes, it’s still necessary to check for any unnoticed changes.

So it’s not that Aoi has a back fetish, but it’s more like he has a Runa fetish.

“Uuu~…….it’s embarrassing”

It seems highly embarrassing for Runa to be seen by her non-biologically related brother, and she blushes deeply every time. Given her age, reaching the point of realizing a fifth-grade crush, having a brother now might indeed make her feel self-conscious.

“I see. Today, it’s pink, huh?”

“You don’t have to point that out every time. Anyway, let’s eat quickly.”

Blushing with embarrassment, Runa started eating the sandwiches on the table.

SHINIGAMI-san: If you enjoyed, don’t forget to add a comment and let me know what you think