Owari no Chronicle - Volume 10, Chapter 16: Dry Desire

THE LAST MARINE– Series SynopsisThe world ends not with a bang, but with a prayer and a shattered test tube. Marine Quinn Calloway, a man accustomed to the structured chaos of war, finds himself on leave in the deceptively peaceful mid-sized city of New Havenburg when the unthinkable happens. Dr. Lucian Kael, a brilliant and devoutly religious scientist at the prestigious Blackwood Research Institute, driven by a fervent desire to unlock humanity's “divine potential,” makes a catastrophic miscalculation. His experimental “Kael Strain” virus, designed for benign purposes, is accidentally unleashed, and its effects are swift, brutal, and biblical in their apocalyptic scope.

After seeking pleasure in the nightclub and a night of romance, he discovered there’s a seed in his stomach;

Based on the popular Vocaloid series, by HoneyWorks, called “Kokuhoku Yokou Renshuu (Confession Rehearsal)“:

Natsuki, a third-year at Sakuragaoka High School, who holds unrequited feelings for her childhood friend, Yuu, who’s in the Film Club. However, instead of being honest about her feelings, she makes him be her confession “rehearsal” partner. Unable to say her true feelings, things start to get complicated when Miou and Akari, who are also in the Art Club, get involved! Will she ever be able to confess for real!?

Akira, was born in the slum and wishes to get out but the only way he could was to risk his life in these ruins as a hunter.