As Izuku grew up with the power of living forever he was sad that the people around him are slowly dying what he doesn't know is that the people he loves can stay alive just like him. One day he met a beautiful girl named Momo he loves her just as she have the same feelings for him as well. When the time came he was afraid to lose her when their time came she was still alive which made him wide eyed and he sees that she is immortal just like him.
Ship
Izuku x Momo
Yes Inko will be alive still it's just that Izuku doesn't know that and is sad that she will be gone soon but turns out that she won't be