This game has great graphics, nice animations, a good translation, a serviceable UI and an engaging gameplay loop. But past all of that, it really shines in the way it handles progression. That elevates this game considerably because fun progression isn't easily definable. The split between daily relationship building and expanding the guild is brought together through a lot of stat management, but it never really feels like a spreadsheet simulator. While the main focus is obviously on your sister, the world feels alive and your impact on the world and on each character is noticeable. The slight bit of RNG with interactions makes everything feel organic but not chaotic. There were quite a few moments where I thought I saw everything there was to offer, then something new came along, expanded the scope of the game and encouraged me to keep playing. That's a very precious and increasingly rare feeling in games, so thanks to the dev for constructing such an enjoyable experience.
My only annoyances have to do with certain gameplay elements not being very explicitly defined. This game certainly doesn't require a walkthrough but there are a lot of tips you can pick up from the community that aren't readily noticeable in-game, despite its fairly comprehensive tutorial screens.
Wolf RPG is okay, definitely better than RPGM, but the clunkiness of the engine does shine through at times. There is no rollback or dialogue history, you can't hide the dialogue box or other UI elements, and there is no CG gallery. However, any screenshots (PrtSc) you take during the game are automatically stored in the game's directory. Would it have been better if it was developed under RenPy, Unity, or some other engine? Maybe. Probably not. My limited dev experience tells me the combat portion of the game would have likely suffered for whatever increase in quality the "VN" portion gained, but it doesn't really matter too much because the coding seems to be pretty solid.
Both sides of the game (combat and dating sim) have a lot to offer, and can actually be rather challenging if you're not paying attention to what you do each day. This is a must play for people who like dating and management sims.