Watashi no Oniichan - Vol. 6 Ch. 26 - Paper Plane Play

[MangaDex]

 

[SasazukaIchimashi]

I know Hanaharu Naruko because he also drew the manga adaptation of Kamichu! (and I believe he drew some of the original character concepts for the anime even though Takahiro Chiba is the credited anime character designer).