Psycome, Vol. 5 (light novel)

Even cutthroat murderers have school athleticsfestivals! Aiming for the top place in the school's first murderathon, Kyousukeand his classmates suffer through backbreaking conditioning. His life gets evenmore complicated when Renko's mother, Reiko Hikawa, pays a visit. She gives thepair an ultimatum: if their class doesn't win the athletics festival, Kyousukeand Renko can't get married! Can he sort out his ambiguous feelings for Renkowhile surviving the upperclassmen's bloodlust?