Mahiro's Panic! At the Hot Spring (Part 2)

'''Mahiro's Panic! At the Hot Spring (Part 2)' (まひろと温泉パニック（後編）, Mahiro to Onsen Panikku [Kōhen]) is Chapter 18 of Onimai: I'm Now Your Sister''. It was originally published on Pixiv on July 28, 2018.

Summary
The drug that turned Mahiro into a girl is starting to wear off, causing Mahiro's penis to regrow. Now he must hide it from Kaede and a suspicious Momiji until a new dosage of the drug turns her female again.

Characters

 * Mahiro Oyama
 * Mihari Oyama
 * Kaede Hozuki
 * Momiji Hozuki