Manga by author Suzaki Yosuke

Meet Yuu Enji, a boy abandoned by his father, and the oldest kid in his foster home who's fed up with adults like his selfish orphanage principal. His dream is to buy the orphanage, so that everyone there can live happily together. With that goal in mind, he decided to get a job, and went to his high school graduation. But from that day forward, the world suddenly changed! Adults have now started to morph into giant chickens and attack children! Can Yuu protect the children and his dreams during this crisis!?

Fall from a building, fall in love.Shinji was a high-school guy without a future.He went up to the roof of a building with plans to jump, only to run into his beautiful teacher, Shinanoya-sensei!Then she made a shocking proposal that would change Shinji's destiny...An exuberant tale of double suicide from the pen of a genius!!