Mahiro's Beach Fun (Part 2)

Mahiro's Beach Fun (Part 2) (まひろの海遊び（後編）, Mahiro No Umi Asobi (Kōhen)) is Chapter 58 of Onimai: I'm Now Your Sister!. It was originally published on Pixiv on November 27, 2021.

Summary
Nayuta accidently consumes the fast-acting feminization drug that Mihari brought along, causing her bust to grow tremendously.

Characters

 * Mahiro Oyama
 * Mihari Oyama
 * Kaede Hozuki
 * Momiji Hozuki
 * Asahi Ōka
 * Miyo Murosaki
 * Nayuta Tenkawa