Essence of Gacha (CYOA v2.2 Uchiya Version [My version], Questions about the acronym CYOA? Search Google!)
This is the essence on which the power of the MC is based, however, I will make some small modifications for myself with a little inspiration from today's gacha games... even more so for this fanfic, which will have strong social development due to the characters that will be introduced.
(So don't expect to see a lot of numbers flying across the screen constantly. Keep in mind that this fanfic will also have the tags: Harem, R18, and Overpowered.)
The development of the character's powers will not take too long, but it will be appealing so that the work can flow well. The universe that will be applied will be from some "anime" that will be mentioned throughout the work, and they are universes that the MC will need a lot of raw power to deal with in the middle of the journey.
(NOTE: The items that the MC receives will be from their previous world and their current world. When the protagonist encounters a character from this world, the Gacha will adapt and there will be chances for the MC to acquire that character's items as well.)