密室に向かって撃て!

[DeepL Translation - needs review] Volume 1 Introduction: For poor student Tomura Ryuhei, the day of his death was a bad day itself. His girlfriend, who had mistreated him, was stabbed in the back and pushed to her death from the fourth floor. His senior who was with him that night was also stabbed to death in the bathroom, unbeknownst to Ryuhei!　What is the fate of Ryuhei, the prime suspect in the two murders?　An overly funny debut novel by an up-and-coming author of humorous mysteries!

(Translator: DeepL)