The Accidental Detective (2016) & The Accidental Detective 2: In Action (2018)

[AlbertV]

These are detective comedies that star Kwon Sang-Woo as a comic shop bookkeeper who has Sherlock Holmes-like abilities and finds himself teaming up with a veteran detective, played by Sung Dong-Il. The first one came out in 2016 and the sequel is making its North American debut next Friday. 

http://www.cj-entertainment.com/movie/accidental-detective-2-action/

[whitesnake]

Accidental Detective online movie reviews - not outstanding but worth watching

Accidental Detective review - http://dramaswithasideofkimchi.com/2017/08/31/the-fangirls-movie-review-the-accidental-detective/ 

Accidental Detective 2 review - http://www.koreaherald.com/view.php?ud=20180531000685