Tsuiraku JK to Haijin Kyoushi

Summary

Mikoto Ochiai is ready to jump off the rooftop of her high school's building after she got rejected by the boy she loves. However, homeroom teacher Jin Haiba suddenly appears on the rooftop for a smoke, talked to her, and saved her from falling down. He even asked her to go out with him rather than die. A black comedy manga about love, life, and death.