Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
Natsuki in the first year of high school and 冬弥 in the fifth year of elementary school were childhood friends next to each other in an apartment.
When I was a child, he called me "Natsuki Onii-chan" and it was cute. But now I call him "Natsuki Onii-chan," and 冬弥, who is voice change and rapidly growing in height, is impertinent.
. Although he is always mean, he notices when Natsuki is weak and gently soothes him.
In such a mature 冬弥, Natsuki gets excited?
The growth story of the two is included.