The day before...

young Izuku/deku turns 12 and get his soulmate mark but instead of it being 1 he has 2? Btw Dabi and shiggy are a in the next school year so they're rouhly the same age but theres a massive problem dekus dating someone else so if they want to get together there will be a small problem cause Shiggy and Dabi are already together.