Goddess of Fate: Waifu RPG

This is a likely portrait, one-handed idle RPG that can be played in short, interruptible sessions. While it features an energy system that limits continuous play, it's generally considered F2P friendly with fair gacha rates and generous rewards. The game offers high replay value through daily play, weekly events, and character collection, making it suitable for players seeking a relaxing, low-demand experience they can pick up and put down easily.