It's very well written, with lots of interaction between the characters. Not just jealousy, but protectiveness, ambition, insecurity, real character development, etc. To be honest there is not a lot of sex compared to many VNs like this. But it is well worth the price.
So I bought this. But it won't progress past night three. Why is it called Night Four? I would ask on discord, but the invite on this page to the discord discussion has expired. What's up?
