The war was over, but so was his relation. He fought, they fought. He survived, they didn't.
Izuku Midoriya the one who lost everything, the only thing left for himself is his loneliness. His friends, family, colleagues noone is alive. He lost his sunshine and what happened next he is teleported to another world by her killer. See Izuku live or rather die slowly, it depends on what his new friends do. It is upto them to either save him or not as Izuku is...
Crying on the Inside
Two people connected by the soul, as if two bodies sharing a single entity. They're intertwined by the universe and picked by destiny. They share everything, the elated highs and the downtrodden lows. From every childhood scar, to every broken bone. The death of one soulmate is the virtual death of another. They are one in the same and their scars are living proof of their closeness.
Or, Izuku and Toshinori are soulmates and they share the marks of their recklessness.
Also posted on Ao3