I Hate Pain deserves more reviews.  The reviews need not b positive.  There can be neutral or even negative reviews.

When 30 total reviews is reached,  I will release a bonus chapter.

You can leave your reviews here :

https://www.novelupdates.com/series/itai-no-wa-iya-nanode-bogyo-ryoku-ni-kyokufuri-shitai-to-omoimasu/#comments

Cheers!