お兄ちゃん, 朝までずっとギュッてして! / Onii-chan, Asa made Zutto Gyutte Shite!
お兄ちゃん、朝までずっとギュッてして！ 女未そら編（1巻）/ Onii-chan, stay tuned until morning! Woman Misora Hen (Volume 1)
The older brother of the Onami family lives with her four younger sisters, Sora, Akane, Kohaku, and Sumi.
Having suffered from severe asthma when he was little, his daily routine is to “sleep with one of his sisters.”
One day, my parents, who are also researchers, ordered me to conduct a demonstration experiment of “immunity improvement by hugging.”
“Hug your sister with love for at least 10 seconds before going to bed every day.”
And if some conditions are not met, there will be no effect.
Aside from the confused older brother, the younger sisters decorated the condition with a frame in the living room as the five rules of hugging a woman.
1. Hug with your sister every day 2.
Hug for more than 10 seconds
3. Smell properly
4. Start over when you get away
5. Hug with affection
Immediately try hugging in the sky as a practice.
The softness and heat of the body that gently deposited the weight was transmitted, and my brother was more excited than I expected.