If you are looking forward to Bright Memory: Infinite I would recommend you to get the first game now.
The developer of Bright Memory: Episode 1 says if you already purchased Bright Memory: Episode 1 you will get
The development of Bright Memory: Episode 1 has stopped due to Bright Memory: Infinite has 1st priority and will be distributed as a separate game. But there will be new features etc to the first game.
You can check out the new game trailer of Bright Memory: Infinite below.