Enkaku Sousa -Shinjitsu e no 23 Nichikan-

A person named Ichiro Shirakawa was murdered in the VIP room of the bar "Light Blue". Kouji Saito, who was drunk at the counter on the day of the incident, was arrested as a suspect. Saito, who claims false charges, decides to work with his attorney, Noriko Shinjou, to gather clues to prove his innocence while in jail. The time limit for prosecution is 23 days, which is the deadline for detention.

[from Wikipedia]