This game is pretty based.
I've played the original release that was up for DL before the steam release. Recently bought the steam release to show my support to the dev.
The story goes like this: You're an older brother living in the country side with your little sister. Your dad walked out on you going on some sort of adventure and telling you to take care of her because she's always been chronically ill (as the game implies). Whilst doing so, you actively build up your guild's reputation and take on quests - molding yourself into a capable adventurer.
The gameplay cycle is pretty fun. If you like to see numbers going up and such, then it's definitely stimulating. The grind can get pretty tiring though. Your initial playthrough is always the roughest, since you don't know where to go and what to do to increase stats. You want to increase your stats as much as possible, since the game rewards you with extra money, events, and skillpoints to "have fun" with your sister. Honestly, you can go most of the game without ever doing anything to her and even have it happen semi-naturally. The most important part of every playthrough is the prologue where they ask you questions about what kind of brother you want to be. This sets your stats for the start of the game and even gives you stat-bonuses for raising some of them. If you want to get a semi-easy mode, my recommendation is to raise the sister's affection + sexual interest. This will allow you to regularly have sex with her and if you end up getting her pregnant it's an automatic good end/game over, but you can immediately start new game +.
The art is wonderful and expressive. It's why I never minded replaying the game and grinding for new events and such. If a game that's entirely monochrome can get me to spend hours on it, then I'd say that's a testament to how much style it has. I will say that the new font they use for the Steam release was very questionable. It can be pretty hard to read/understand, but your eyes will eventually acclimate to it. The H-scenes you have are especially pretty/detailed. It looks like scenes ripped straight out of some classic doujins.
4/5 - Solid game bogged down by pretty lengthy grinding that can get dull after your nth playthrough. Wish there were more options on clothes/H-scenes, but the amount of content here for what I wrote off as another HRPGM clone is pretty astounding. It's also one of the rare wholesome games on the site (at least compared to a lot of recent stuff released lmao)