Responses

My assumption is that it's to not end up being ahead of the mangaka's releases. You can buy the latest chapters here (you'd buy Chapters 13-15). Keep in mind that it's in the original format, not the webtoon format. (づ ̄ ³ ̄)づ
https://book.dmm.com/series/?series_id=854425
Update/Spoilers
Recently Chapter 15 (equivalent is episodes 43-45) just got released in Japan, and it looks like we're seeing a bit on how Koichi is adjusting to life in his new world to prepare becoming the bride of Caius (he also has a womb tattoo now from the previous chapter huehuehuehue). And don't worry, we're getting some nice smutty lovemaking scenes again! (๑•ㅂ•)و✧
But wait, is there trouble in paradise coming for their love(making) life? Koichi and Caius will be going to the country of the long-eared folks, Alfein (or however they decide to translate it as). We're on the start of a new story arc! (=・ω・=)