BubbleBee-Ace
What happens when a protagonist finds a phone in a world that isn't the right timeline for that phone? And what about our other protagonist that lives in Japan that has a phone that can change sizes? What happens if the only thing they can do on the phone is call the person with the other phone, see what their doing, pass information, and be a hologram? But.... what if.. the protagonist in Japan... could travel dimensions to be with the other caller? And what if, their names were ceil phantomhive and Izuku Midoriya?