Akuma no Riddle: Riddle Story of Devil Vol. 4 (manga)

The number of flower arrangements adorning Class Black continues to grow as the amount of assassins leaving its ranks continues to rise. Tokaku has defended Haru from all murderous attempts, but the weight of victory sits heavily on them both. Now Haru and Tokaku must face Shuto Suzu and disocver a way to disarm the bomb she's attached around Haru's neck. Will the duo find the right password in time or has their luck finally run out in the face of the oncoming storm?