I guess this series just got canned because it was a failure not worth the effort??
While it's true "long" series tend to decline in sales the drop isn't that big when a series is good CH1 10,373 CH2 3,733 CH3 3,311 CH4 4,617
Only ch4 got a bit jump but not enough to justify to keep investing energy on this, the antagonist is an unlikeable prick and the heroine is a bland pushover whose tits got ruined.
Compared to Oshiego Kiss Hame Nikki who got a better following selling for the chapter 1 22,891 and second chapter 8,427 is more solid and profitable, the antagonist is a bad person but isn't hateable, the heroine is a secret slut but not a pushover and has some backbone.
I think the author had in mind a third chapter but I'm not sure if there was any progress since last year announcement.