It would be so great if the synopsis actually told you what this is about ...
What it is about is you go to Argleton looking for your missing friend after waking up from a serious injury you experienced. Your friend leaves a note and you follow it to the restaurant listed on it and you find your best friend's younger sister, Prim, who runs the Barrie restaurant and was a good friend of yours while you were kids.
As you help Prim run the restaurant you will find different discoveries while exploring Argleton such as many new characters, events, and stories to see. While you stay longer in Argleton you will meet new characters that have their own stories to tell too, and you will learn more about the town and it's inhabitants. You will learn more and more about the secrets Argleton has hidden in it's town and what mysteries have been left unsolved.
You interact with characters and learn more about each one and bond closer with them the more you interact with them, and will unlock more activities with a character you interact with as you continue their story more which you can check with the profiles. Depending on the character, the closer you bond with a character the more lewd scenes you can unlock with them. Everything is up to you. You can interact with the characters you want and romance the characters of your choice. The money you earn can be used to buy different things such as gifts or costumes that you can give to the girls. And the most important thing is to hope you enjoy your stay in Argleton! XD
Does this help a bit?