I found the missing chapters on the internet, the translation is awful tho.
Here's the summary of what happened between chapter 27-33:
Chapter 27-29:
Nothing of importance, just boobs, bewbs and more boobies.
Neko and Chiko has acknowledged each other's feelings towards Ryouhei
Also, karaoke episode.
Chapter 30-32: Boobs Beach Episodes!!
Here's the big reveal,
she has no voice. (Chapter 32, last page.)
Chapter 33 simplified pages:
https://imgur.com/a/MncU8Va
And I was like, "Dayum, that's hurt."
Well finally, I wouldn't think I'd see the day where it would be fully translated.
That is I didn't remember it as such ecchi.
Overall above average comedy that had its momen, but the main subject was kinda under-exploited and the author got suddenly very horny and flooded the whole thing with discutable ecchi. Also the love triangle was kind of innerving, because the two rivals don't dislike each others, nor clashed each others interest, so the rivalry felt forced.
Oh, and the ending sucks ass, the MC turns out to be an indecisive player and the final twist is completely lame.