The older brother of the Onami family lives with four younger sisters, Sora, Akane, Kohaku, and Sumi.
She suffered from severe asthma when she was little, and her daily routine is to “sleep with one of her sisters.”
One day, her parents, who are also her researchers, ordered 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, it will not be effective.
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 10 seconds or more
3. Smell properly
4. Start over when you get away
5. Hug with affection
Her brother chooses Akane as a hug partner.
With a hug that wraps her arms around her neck and hugs her, her brother is thrilled to be aware of Akane’s feminine body, but she does her best not to realize that she is her sister.
One day, when I returned to her room after taking a bath, I witnessed Akane, who was in charge of her co-sleeping, doing H alone.
