Intense(Lee Kyung Ha)
Kind of melancholic. But very good! https://www.lezhin.com/en/comic/intense
Lifeless Man
I've read it at Lezhin, it's ok. https://www.lezhin.com/en/comic/lifelessman Related series: http://www.mangago.me/read-manga/the_other_men/
Stop at the Red Light
Prequel & Main Story - See You at the Crosswalk: http://www.mangago.me/read-manga/see_you_at_the_crosswalk/
See You at the Crosswalk
Related series (read after this): Stop at the Red Light: http://www.mangago.me/read-manga/stop_at_the_red_light/
Lies like Lies
The same author of "Addiction". http://www.mangago.me/read-manga/addiction/?OW6h
Escape into Oblivion