Welcome to the Show Harem System With No limits of any kind

While walking home I noticed a weird sound coming from an alley to my right I glace over and I see a creepy due with a gun cornering a young girl. My first instinct was to help but I didn't want to just jump in so I snuck behind the creepy due then attempted to place him in a sleeper hold in the ensueing struggle the gun had gotten between us and went off we both froze but I managed to get the gun then emptied it into the waist of space that would harm a child. After that I passed out.
I wake up to a voice saying,''Hey mister are you awake?''
All I can think of was, I heard a giggle and open my eyes to see the little girl she said .' thank you for you kindness my name is Gabriel I am a Angel here to give you a trip to a new life''.
I pause in thought to process that and say.'' OK so you can I chose where to go?''
She smiled and said '' Anywhere you wish''. Surprised I ask '' Anywhere why would I have that much Freedom''?
She smiled and said,'' Because you were a good man and also saved me when you Could have just continued walking like others before you''.
her smile at the end melted my heart. I decided if I could I would find a Way to keep that smile on her face. I the noticed her smile get bigger and realized she could read my mind. I decided to roll with it so I asked
'' if I can go anywhere can I go to another earth like anime world?'' maybe should have mentioned I love anime?
Not Otaku level but close. she smile and said ,''yes and you do I will give you gifts from me to show my appreciation for your sacrifice.''
I thought long and hard about what I wanted and asked if there was a limit on the gifts that I could get like numbered or how powerful they could be?
The only one was'' No asking to be A True God'' and I knew what she ment by that and I agreed with her that would be boring. like Saitama but worse. so I asked ,'' Can I have a System With No limits, has an Ai that I can customize, the Pause Menu with options, the ability to recall information when need, the ability to chose companions to take on my adventures, the ability to give them customizable eternal youth, and the ability to customize myself. she smiled snaped her fingers and said'' done who is your first companion and where are you starting your journey?'' this time I smiled and said'' wll you will be my companion? and we shall go to Avatar,'' she was stuned then composed herself grined saying,'' when do we start?''