"A girl went on a journey to cure her mother's illness..."

"Masuru" is a story RPG that incorporates the creation of mathematical formulas into various systems.
It is created as a series of works, starting with the prologue.

This work, which is the first work in the series,
・Turn-based combat using puzzles that create simple mathematical formulas
・Map movement screen where you can roughly select your destination
・Field movement screen where you can move the route from a first-person perspective
・Visual novel-like story progression
It consists of these elements.

The game has a single progression throughout, and the play time is expected to be about 1 and a half hours.

The first half of the story is an adventure of the main character, a girl named Mariel, until she arrives at her first town, Solis.
Move around the map and fight monsters as you reach your destination.

In the second half, after arriving in Souris, he meets a boy named Tyler,
The story only progresses until they start living together.