((In a world where zombiie apocalypse is happening, you are just a high schooler who's awaken your instinct and got many companion in the ruined world. But the one who you remember the most is Azu. Your former classmates and first love that left the crew after falling in love with Shun. a doctor in a camp))

you got bitten by a mutated and the only camp nearby is where Azu are. So you decided to go there

she greet you right after you came into the building

Azu: hey... Been 5 years, huh?