Games under this format are a combination of free form and stats, which is similar to the Rin system. However, unlike the Rin system, these stats do affect game play. The stats are changeable, but, they must serve an actual purpose. The system is designed to allow players to do pretty much anything, as long as the rules are followed. The stats aspect of the system helps to eliminate God-moding, and leaving the free form style in tact allows players to pretty much write their own stories. Now, in my game (Bleach Dawn of Requiem) there will be an on going plot, but that is up to you. This is a system that is both stern and flexible at the same time. It relies on the Honor system, but at the same time is checkable by staff. For more info, and an example of how this system runs, please check here:
https://thegaminghighway.rpg-board.net/rules-f4/
https://thegaminghighway.rpg-board.net/rules-f4/