”I wonder if you can solve this...?”
A new addition to the "Pretty Girls" series!
This time, in the puzzle game "Rivers", you can compete with beautiful girls for special costumes!
Each stage consists of 4 rounds, and in the final round, as you eliminate tiles, a variety of outfits are revealed: cute, cool, and sexy.

◆ Puzzle Game "Rivers"

A simple but profound puzzle game where you have to make pairs of Mahjong tiles.
If you can eliminate all the tiles within the time limit, you are in the clear!
However, if you don't think about the order in which the tiles are removed, you will get "stuck" and the game will be over.
The layout of the tiles are changed each time you play, so you can enjoy playing it as many times as you like.
There is also an "easy mode" with no time limit and a hint function, so beginners can enjoy the game!

◆“KAWAII" girls are waiting for you!

There are 6 characters in all, and you can get costumes by clearing each stage.
The costumes you collect can be changed in the dressing room!
All of the characters are voiced!

◆ Character Introduction

• Riche
  Feared as a demon king, but despite her title, she is actually a quiet and kind-hearted demon girl.
  
• Reiu
  She has a strong sense of duty and is kind to those under her. She is serious and earnest in everything she does.
  
• Kanon
  An idol among idols, popular for her smile and cheerful manner of speaking and gestures.
  
• Ren
  She is cool and hates to lose. She has a bit of a temper, but faces everything head-on.
  
• Cecil
  Her good looks and shyness give others the impression that she's a bit of a jerk, but inside she's kind and motherly.
  
• Risa
  With her cool good looks and strong personality, she is adored by the girls around her and admired by the boys as well.

* All Bishoujo characters are officially licensed and used.
* All characters appearing in this game are over 18 years old.

◆ Eliminate mahjong tiles as quickly as possible!

This is a game where you make pairs of Mahjong tiles and then eliminate them.
The game is cleared if all the tiles can be eliminated.

• Select two tiles of the same pattern to make a pair.
  
• You can erase the tiles if the number of bends is 2 or less when connecting the paired tiles with a line
  
• You can also remove the tiles of adjacent pairs.
  
• If the player selects a tile that cannot be erased in a pair, the time limit decrease.

◆ Dressing room powered up!

The dressing room is a familiar feature of the "Pretty Girls" series, with greatly increased functions!
When you complete each stage, you will get a new costume for your character, which will be added to your dressing room.
The "Pretty Girls Rivers" dressing room has been expanded to allow up to 6 characters to be placed in the room at the same time!
You can also customize the position of each character, their facial expressions and their costumes!