Since you bought the bundle then you can get Null 2: Full version for free.
Simply DM me on Discord or Twitter and I'll send you a download key.
Here are some answers to your lore questions (Spoilers for Happiness 1: Remake)
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1-Time branches are basically where a huge amount of timelines converge. In your example if you wake up in the morning and have a choice to either go to school or go back to sleep this creates 2 timelines ( Timeline A and Timeline B) however you have to keep in mind that you are not the only human presented with this choices, millions if not billions of people in your timeline get this choice too which creates billions of variations and timelines.
These timelines constantly converge and diverge the moment another choice is presented to you and every other human in your timeline.
2- In Happiness 1: Remake Butterfly is in his late 40's.
3- Mirall does know Butterfly, she been trying to stop him from destroying time branches for a while before the events of Happiness 1: Remakes.
Thank you for the very kind words. I'm glad you are enjoying the series and I appreciate you for supporting the series.
Also a quick heads up, This game ''Null 2: Genesis'' is recommended to be played after finishing the game '' Naz'' and before playing the game '' SYSTEM''.
You can find the complete and correct order to play the series here in my itch.io profile:
This game is not the first game to play. I think you are playing the games in the wrong order. The correct order to play the series is this one below:
3-A Happiness Story [Remastered]
7-Goodbye Time Traveler [Remastered]
8-CC : The Girl Who Chants Love At The Edge Of Time [Remastered]
9-Null
14-''End Of Happiness REMAKE''
17-Farewell My Happiness [Remastered]
18-Identity
19-Goodnight Mirall [Remastered]
20- Naz [Remastered]
21-Observer
22-SYSTEM
23-Hassan : A Happiness After Story
You can also find this play order in my profile here:
Please DM me on my discord or on my Twitter so we can discuss it
My discord is fouzi.
(Don't forget the point at the end of my name)
My twitter is https://x.com/Fouzi94
Spoilers for this game and ''Observer'' game below :
The memory transfer is the shadowy creature in ''Observer'' game . He absorbed the real SYSTEM memories and tried to take it's place . Butterfly kill that shadowy System later in ''Observer''. So technically ''SYSTEM'' game take place before ''Observer'' game.