wtf why does this game has 1600 pages, is it that good?
It is a great game and fairly popular because it's actually a full blown 'game' not just a VN, or BS excuse for a sandbox game where a few mindless tasks have been strapped onto a VN to pretend it's more than a VN. This is a full blown RPG with experience, quests, gear customization, special moves, turn-based combat, etc. Oh and a LOT of dirty fucking sex.
It's loaded with filthy shit, like tons of optional NTR paths, banging your dead father's girlfriend while she thinks about how much bigger your dick is than his was, and daughters joining you in bed while you rail their mom. Early on a witch captures you and "curses" you with a spell that makes your dick grow bigger and fills you with lust; you then go around feeding your spunk to girls to corrupt them into doing increasingly deviant shit. There's a whole fucking quest line about banging Tia in the ass, which includes getting her mom to help you whip up some homemade lube. In short, if ever that was a game that epitomizes the degeneracy of F95, this is it.
I will say currently it is in kind of a transitional phase where the dev has started to change some things (many for the better, like revamping the combat system and making it so you don't have to fuck every single LI to progress the story) and squashing the many bugs that have cropped up along the way. There are a hell of a lot of quests and storylines that are stuck waiting for updates because the dev included soooo many LIs and side stories, and keeps trying to please the patreons by developing next what has been voted most popular. This has led to many pages of spirited debate and arguments in the thread by people (myself included) who were butt hurt when the LIs they wanted to see progress kept getting snubbed in favor of others.
Strap in (or strap on, as the case may be,) you're in for a wild ride - and if you forget your lube just go see Tia's mom, she makes a mean homemade one.