TL;DR: Great slice of life with a bit of adult content (honestly you can cut it all out and story will barely change), good story and simple but well written and adorable characters.
Anyone who played Summer Memories will immediately recognize that this game was heavily inspired by it, our shota arrives to aunt's house for a month and from there proceed to learn dirty things with several women. That said it would be ill natured to call it a copy since it adds a lot of it's own twists, much bigger focus on story and characters and have a different focus altogether.
Gameplay wise it consist of managing your time slots (4 daytime, 2 nighttime) to see various events and occasionally break the game to earn some money for extra stamina and horniness food. For those who are nervous about time management aspect, it is fairly relaxed and non intrusive, game is very easy to break in various ways to get infinite stamina to do whatever and grind is minimal here. It is nothing groundbreaking but it's a fine system and it works well enough, there are no annoying minigames either (fishing and bug catching are literally one click) and overall it's simple and it works, it's definitely a vessel for the story more than anything else.
Visually it's absolutely wonderful, animated scenes are very pretty to look at, overall pixel art make characters feel very animated and alive, full of personality. I mean it's overall great, what do you want me to say.
Where the game really shines is it's characters and writing. A lot of adult games suffer from characters being, for a lack of a better word, goddamn obnoxious and annoying, never knowing when to shut up or say something or being as interesting and engaging as a doorknob. I am happy to say that every main girl gets good character development, little personal story, even our shota gets a little character arc and the best part is it's just so well written. Don't get me wrong, the story is very simple but it's wonderfully presented and paced and also, as i said, well written, dialogues are nice to read and overall it's good feels all around (except one very dark turn with a scarily accurate portrayal of traumatic anxiety). If you play this game for anything, play it for characters and story.
There is a reason i only give it 4 out of 5 however, since there are several things that just kinda could be much better.
-Adult content is just... lacking, every girl get a dissapointingly small amount of scenes (which are still good), but it could be so much more.
-Also i cannot help but compare it to Summer Memories and it just lacks the freedom SM presented to you since event progression here is strictly in order.
-This is also my big peeve and a lot of great games like Monochrome suffer from this, but i need my moans, gasps, queals and whatever synonyms for good happy noises you can think of and they are just not here.
-Since the game is way too easy to break there is very little... game left and it's honestly more of a visual novel than anything.
Overall try it out if you like good natured and warm feel-good slice of life with some adult content here and there, this is good stuff here.
I hope developer continues from here and will make next one bigger and even better, writing is definitely dev's strong suit so keep it up.